Create endpoint network Stream - pre-allocation for strings

Similar Questions

• How to give endpoint network Stream as input/output for a Sub VI

  I have a program to write data to a stream and to read using the host. In the reader program, I have a Subvi, which I need to pass endpoint network Stream. I'm unable to do so.

  https://decibel.ni.com/content/docs/DOC-15920, in the program in the link, he said he a VI that reads an element in the stream. If you see the screenshot, it connected endpoint network Stream for a subVi.I am unable to do so. A can you please tell me how to do it.

  Thank you

  You will need to place a data network flow control in your Subvi. You then connect the control on the part of the connector.

  You can place a control of flow network as follows:
  In primary VI you take the wire of network flow and right click. Select create - control. Use strg + x for the main control of the VI to the Subvi from the port.

  Then follow the instructions here http://digital.ni.com/public.nsf/allkb/1FA00093A04BFCF5862570920049E482 to connect the control to the connector pane.

  There may be an easier way to do it, but it works very well.

  I hope this helps!

• In the Palette of what are endpoints network Stream?

  I adopt/adapt the project for example LabVIEW 2012 in real time to my needs and must create some additional network data stream parameters.  I can't find these on the pallets of façade, or the quick search Drop.  I can, of course, copy one of the code example, or drop down a function of stream network on the block diagram and create a control from the proper flow terminal, but shouldn't this be located somewhere, say in the Refnum palette?  It is also "conspicuously absent" from the help topic "Refnum controls Types", which mentions the other Refnums not on the Refnum palette, but not network streams.

  Suggestion to OR - at the risk of making the Refnum huge Palette (lightened in seen, say, a palette under "Advanced"), put all classes of Refnum NOR in the Refnum Palette, please.

  BS

  Duh - they aren't Refnums, they witness e/s, so they belong on (but not on) the e/s Palette.  The point of origin, that all the that refnums belong somewhere on the Refnum Palette can now be extended to say that all the orders/lights/o Panel belong in the e/s Palette.

  BS

• Get the DLL string (memory allocated for DLL)

  Hi, I'm aware there are a lot of discussions around this topic, but there are a lot of variations and I've never used before LabVIEW, and I seem to have a hard time at a very basic level, so I hope someone can help me with the below simple specific test case to put me on the right track before I pull my hair remaining.

  I've created a DLL with a single function "GenerateGreeting". When it is called, it allocates enough memory for the string "Hello World!" \0"at the pGreeting of pointer, copy this string to the pointer and sets the GreetingLength parameter to the number of allocated bytes (in the DLL in the end, I want to use, there is a DLL function to free the memory allocated for this way).

  I created a header file to go with the DLL containing the following line.

  extern __declspec(dllimport) int __stdcall GenerateGreeting(char* &pGreeting, int &GreetingLength);
  

  I then imported the LabVIEW file using the import Shared Library Wizard. That created a "generate Greeting.vi' and everything seems somewhat sensitive for me (although this does not mean a lot right now). When I run the vi, the ' GreetingLength on ' display correctly '13', the length of the string, but "pGreeting out" shows only three or four characters (which vary in each race), place of the string that is expected of junk.

  The pGreeting parameter is set to the 'String' type, the string "String pointer C" format, size currently Minimum of 4095. I think the problem is that the DLL wants to allocate memory for pGreeting; the caller is supposed to pass a unallocated pointer and let the DLL allocates memory for the string the right amount, but LabVIEW expected the DLL to write in its buffer préallouée. How to with LabVIEW? Most of the functions in the DLL in the end, I want to use work this way, so I hope that's possible. Or I have to rewrite all my DLL functions to use buffers allocated by the appellant?

  The vi , header and the DLL are atteched, tips appreciated. Edit - cannot attach the dll or the headers.

  tony_si wrote:

  extern __declspec(dllimport) int __stdcall GenerateGreeting(char* &pGreeting, int &GreetingLength);
  

  Although char * & pGreeting is actually a thing of C++ (no C compiler I know would accept it) and this basically means that the char pointer is passed as a reference. So, technically, it's a double referenced pointer, however nothing in C++ Specifies that reference parameters should be implemented as a pointer at the hardware level. So free to decide to use some other possible MECHANISM that takes the target CPU architecture support a C compiler constructor. However, for the C++ compilers, I know it's really just syntactic sugar and is implemented internally as a pointer.

  LabVIEW has no type of data that allows to configure this directly. You will have to configure it as a whole size pointer passed as a pointer value and then use a call MoveBlock() or the support VI GetValuePtr() to copy the data on the pointer in a string of LabVIEW.

  AND: You need to know how the DLL allocates the pointer so that you can deallocate it correctly after each call to this function. Otherwise you probably create a leak memory, since you say that the first 4 bytes in the returned buffer always change, this feature seems to assign to each run of a new buffer that you want to deallocate correctly. Unless the DLL uses a Windows such as HeapAlloc() API function for this, it should also export a function according to deallocate the buffer. Functions like malloc() and free() from the C runtime cannot always be applied in the same version between the caller and callee, so that calling free() by calling on a buffer that has been allocated with malloc() in the DLL may not work on the same segment of memory and result in undefined behavior.

• Error 42 on Create Endpoint of network news reader

  I am trying to use the network stream.  I have not had any problems on my Windows System 7/LabVIEW 2011.  However, when I tried the same code on my computer laptop desk or at home (both windows 7/LabVIEW 2011), I got a 42 error trying to create the endpoint of player.

  I am very confused!  The code is similar to that in the examples, it works on a PC, but fails on the other two.  I think it's something to do with the LabVIEW installation or a configuration of Windows.  I thought that they were all set up in the same way, however.

  Does anyone have an idea of this error?  This is the code that breaks down...

  

  
  

• Endpoint creare network Stream Reader Launches error-314350 if the target is executable

  I take a Simple Network Streams.lvproj example provided with LabVIEW 2015. It works very well in LabVIEW environment. Then I create an EXE file using simple flow network - Target.vi of this project and that you try to run the target as the EXE and the host like VI (Simple flow network - Host.vi).

  Step Creare network endpoint Player streams of Simple flow network - Host.vi (runs in the LabVIEW development environment) lance error:

  Error 314350 has occurred to create network Stream Reader Endpoint in Host.vi

  Possible reasons:

  LabVIEW: Another application is already streaming of data to an endpoint in the specified context.
  If you specified a frame name in the name of the reader or writer terminal endpoint, you must specify a name of context not used.
  If you have not specified a context name, you must specify a name unused context by entering the name of the reader or writer terminal endpoint URL.

  I have reastarted LabVIEW and all computer, so there is not another application that could flow. However, the error does not disappear. What could be the reason?

  Thank you

  When you stream from an application, you will need to provide a 'way' in the URL.

  To make your (OK, NIs) examples work in this "context":

  In the Target.vi - to precede the names of endpoint with '//localhost:sns '.

  In the Host.vi - change the IP address control entry target to "localhost:sns".

  Check out the latest entry in this reference:

  Specification of network flow point endpoint URL

  To learn more about network streams:

  Communication without loss with flow network: components, Architecture, and performance

  Note that these examples are only starting points. More code is needed to formulate a robust demand.

  Steve

• RMAN-06091: any string allocated for maintenance (of a suitable type)

  Hello

  Run {}

  2 > allocate channel c1 device type disk;

  3 > remove redundancy noprompt obsolete 1;

  4 > output channel c1;

  {5 >};

  Backup set 706 13 - SEP - 26

  Save the song 706 ABSTEST_m4okqca5_1_1 13-SEP-26

  Backup set 708 13 - SEP - 26

  Save the song 708 ABSTEST_m5okqcla_1_1 13-SEP-26

  Backup set 707 13 - SEP - 26

  Save the song 707 ABSTEST_m6okqcla_1_1 13-SEP-26

  Backup set 709 26 - SEP - 13

  Save the song 709 CONTROLFILE 13-SEP-26. ABSTEST.c - 870929118-20130926-00

  Backup set 711-28 - SEP - 13

  Save the song 711 ABSTEST_m8okv0qk_1_1 13-SEP-28

  Backup set 710 13 - SEP - 28

  Save the song 710 ABSTEST_m9okv0qk_1_1 13-SEP-28

  Backup set 712 13-SEP-28

  Save the room 712 ABSTEST_maokv0qs_1_1 13-SEP-28

  Backup set 713 13 - SEP - 28

  Save the song 713 ABSTEST_mbokv0qs_1_1 13-SEP-28

  Backup set 714 13 - SEP - 28

  Save the song 714 ABSTEST_mcokv23m_1_1 13-SEP-28

  715 28 - SEP - 13 backup set

  Save the 715 CONTROLFILE 28-13-SEVEN piece. ABSTEST.c - 870929118-20130928-00

  Backup set 716 13-SEP-28

  Save the song 716 ABSTEST_meol0dc2_1_1 13-SEP-28

  Backup set 717 28 - SEP - 13

  Save the song 717 ABSTEST_mfol0dc2_1_1 13-SEP-28

  output channel: c1

  RMAN-00571: ===========================================================

  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.

  RMAN-00571: ===========================================================

  RMAN-03002: failure of the delete command to the 30/09/2013 09:08:07

  RMAN-06091: any string allocated for maintenance (of a suitable type)

  Please help me

  Hello

  The band channel had not allocated when try to remove obsolete backup to tape. With the help of the following command to check that there is no backup sets on tape.

  RMAN > list backup;

  Run the following commands to remove obsolete backup games on the discs and tapes:

  RMAN > allocate channel for maintenance of type disk;

  RMAN > allocate channel for maintenance device 'sbt_tape' PARMS '... » ; ==> Please change «...» "your band real params

  RMAN > remove obsolete;

  If you want to remove obsolete backup games on disk, you can use the following commands:

  RMAN > allocate channel for maintenance of type disk;

  RMAN > remove obsolete device type disk;

  Note: If above solution does not resolve your problem, contact the Oracle Support for known bugs.  See Metalink ID [ID 567555.1]

  Thank you

• Need help understanding create new network / different subnets for 2nd VM NIC

  I am newer to Vmware and not quite sure that the best way to accomplish the task.  I have a couple of hosts of ESX 4.0 update 1, each host has several physical network connected to the LAN interface cards and iSCSI, vCenter with about 10 mV and each VM has only a single virtual NETWORK adapter for LAN.

  I need to install a new virtual machine with a special application that must be double virtual NICed.  1 NETWORK card must be on the private LAN (e.g. 192.168.10.x) and NIC2 must have a public IP (e.g. 4.2.2.x).  I was going to give NIC2 a private address and NAT through our Cisco PIX firewall, but I am told that causes problems with the application and it must have a public IP address on NIC2.  I now host a card physical NETWORK connected to public physical switch outside the firewall (so I can give him a pub addess).

  I have a physical NETWORK card I booked for this on the Vmware host.  How can I create virtual switch separate from the local LAN, associated with the physical NIC to the virtual switch, assign a range of IP addresses that are associated to the public IP address works (if that's what I do)?  From there on, I think that we would give the real public IP to vNIC2 during the installation of the OS.

  Thanks for any help you can offer.

  Steve

  Welcome to the forums.

  You can add an additional vSwitch and assign the 2nd physical NIC as the uplink. All the networks is done through the vSphere client configuration tab. In the virtual machine settings just add an extra vNIC and connetct for the new vSwitch.

  You should have a look through the information on http://www.vmware.com/technical-resources/virtual-networking/

• How can I create a network and put in on my iphone 4S for use with wifi?

  I have a phone, a personal hot spot 4s, a router and a broadband cable. Everything is running but I can't figure out how to get my network on my iPhone for use with Wifi.  Also, I don't know how or where on the phone to set the password and since I don't have a different password, I can't use my wifi?  Help, please!  My iPhone tech is exhausted and I'm going against a brick wall with my internet service who refuses to provide me with their ISP, etc.

  Hello

  Please ask your question the following support forums.

  iPhone: Apple Support communities:
  https://discussions.Apple.com/community/iPhone?CategoryID=201

  Concerning

• Network streaming - stand-alone application

  Hello
  I wrote two screws that communicates with network streaming, they work very well. I have applied (Build .exe) and try to run as both standalone applications. They cannot allocate each other.
  Probably, the definition of the endpoint URL should be changed due to construction.
  Please advice.
  Gabi

  Congratuations - you ran in a very subtle point that NEITHER has not explained well!  The 'official' name of an endpoint is:

  neither. DEX://host_name: nom_du_contexte/endpoint_name.  As NEITHER explained somewhere, the name of the Protocol, "ni.dex:", is not necessary.  They also explain that, when the host_name is 'localhost', she also is not required.  What is less clear, is "What is the way?"

  This turns out be the name of the application that runs under the specific end point.  When you run mode development, programming of your application and test it by pressing the arrow to run, the application is "LabVIEW" (technically, it's 'LabVIEW.exe', but also the .exe is not necessary).  As is the way by default (without papers), you need not put it in the string.

  However, when you build executable files, the context changes.  To clarify, I built executables called 'My Host' and 'My Target' (especially if there is no error between the VI, 'Host.vi' and the executable file, 'My Host.exe"instead of"Host.exe").  In Target.vi, I changed the strings to flow to start //localhost:My target, and in Host.vi, I changed the specifications for the URL target to include ": my goal."  Extracts showing these changes are included here.

  Either way, I could not host and target screws you have included in your ZIP file to work in development mode, so I started, taking the host and target live of my examples of LabVIEW 2012 directory, copy them into my LabVIEW in My Documents folder and a new construction project.

  Note that, as written, this version of the code will work only as an executable file (because the way is no longer LabVIEW).  If you want to write a routine that will work in the development and Run-Time environments, simply look at some properties for the Application.  I didn't think to do that until I already wrote this note, that is why this code is not in the previous examples.  However, it is probably better written as a Subvi, as it should be used by the host and target live

  Good luck.  Let us know if this fixes the problem for you.

  Bob Schor

  

• RT-target short-term memory when writing to the network stream

  Hey there,

  I have a program that transfers data acquired from the FPGA to the host PC. RT - VI reads data from the FIFO DMA and writes it to a network stream (BlockDiagram.png).

  Now, I am a phenomenon, that the RT-target load his RAM until it is full and accidents.

  I have no idea why this happens, network flow buffer is empty, all the items are read by the host, and there is no table built by indexing or so.

  Someone has an idea, how I can handle this?

  Best regards

  Hey there,

  I had the problem solved,

  the problem was the buffer of the sender endpoint was too big. Unlike this problem: http://digital.ni.com/public.nsf/allkb/784CB8093AE30551862579AB0050C429, wasn't the growth of memory because dynamic memory allocation.

  It is just the normal speed of the cRIO while allocating buffer. The sender buffer affecting many smaller, memory growth stops at a specific level (DSM2.png).

  It is strange, this use of memory that grows slowly, despite the creation of the endpoint with preallouee buffer, so that its use dark quickly when the VI - enforcement stops...

  Best regards...

• "Unexpected error" occurs when you try to create a network with a security profile wpa/wpa2 enterprise

  I recently started using Windows 7 x 64 and I'm unable to create a network with WPA2 - Enterprise Security profile.  I have a wireless card for Intel PRO/Wireless 3945ABG with 13.0.0.107 driver version.  I have had no trouble to create this network in Vista Ultimate x 86 profile, and I do not know what is causing the error.

  I went through the steps to create a network profile:
  1 'Add' a network profile
  2 ' manually create a network profile '.
  3 name the profile, and then select WPA2 - Enterprise with AES encryption

  When I click on 'Next' to complete the configuration of the profile I just get a message that says:
  "An unexpected error has occurred."

  Has anyone experience the same problem?

  Thanks to another post and help Orgwizard, followed it to Symantec Endpoint Protection. I had emigrated from laptops using the Easy Transfer Wizard and did not reinstall MS and sought instead to Microsoft Security Essentials. MSE deleted and reinstalled MS and everything is fine now!

• How to convert growable pre-allocated disk? [RESOLVED]!

  Hi all

  Don't worry my question isn't so difficult. I installed VMware Workstation 10 and that you have installed Win XP SP3 as guest OS on x 64 host Win8. I made a disc that is pre-allocated on the c: drive and now the space is running low (space on drive C :) and I want to convert in growable.

  Of course I checked this: examples using the VMware Virtual Disk Manager , but I cannot understand how to use these commands. Everytime I open the VMware Virtual Disk Manager it closes immediately. So how can I use this second command? Can someone tell me? Thanks in advance.

  Post edited by: HamzaUmar

  Post edited by: HamzaUmar

  It's actually the replacement/change of name, which was not correct.

  According to the virtual disk format, a virtual disk may consist of:

  • one hard file that contains metadata such as data user
  • two files where hard contains metadata and -flat.vmdk contains data for the user
  • multiple hard files where hard contains metadata and the other hard file (... f00x.vmdk or... s00x.vmdk) contain the data used

  Note: There are also a few other types of files, but these are the most important.

  With the conversion, you ran (t 0), you have created a "single growable virtual disk" that contains the metadata as user data.

  To make sure that I don't give you directions wrong, please let me know what hard files you currently have?

  The steps you provided, I guess you still have the new.vmdk renamed on the F: drive that you used to replace the Windows XP Professional - flat hard. If this is the case - and with disk space is low, you have on C: drive - I would recommend that you use the "extensible virtual disk split into 2 GB files" (t 1) for the virtual disk. This will allow you to increase or compact the virtual disk in the future without needing a huge amount of additional disk space.

  Again, assuming that the virtual disk on the disk F: file is one that you still, you could remove the current "Windows XP Professional.vmdk" and "Windows XP Professional - flat hard" files in the folder of the virtual machine on the C: drive (remember to backup the files before deleting them), then rename "Windows XP Professional.vmdk" on drive F : to "new.vmdk" and run:

  VMware-vdiskmanager-r F:\New.vmdk t 1 "C:\Virtual Machines\Windows XP Professional\Windows XP Professional.vmdk"

  This command creates the file descriptor of "Windows XP Professional.vmdk", but also a number of files "Windows XP Professional - s00x.vmdk" according to the provisioned virtual disk file. With the 15 GB virtual disk you should end up with... s001.vmdk - by-s008.vmdk.

  André

• VM pre-allocated low disk space

  Hello

  I run 3 VM (VMware Workstation), each has its own hard drive. When I installed these machines I have previously assigned space on the assumption (false!) that the virtual machine would not grow. I'm now so low space than a machine cannot start, and as much as I know I can't shrink a pre-allocated VM?

  First of all, could someone tell me what increses in fact the size of the file and as a percentage of the available disk space how much I have to leave in the future of the room?

  Secondly, how can I get out of this situation? As a temporary measure, I could copy the virtual machine to a drive with more space, but I need to get it back on the original disc later, is it possible to resize a pre-allocated machine?

  I think that, in the light of the foregoing, you can guess that I am a user not a computer scientist.

  Thanks for your help... Marcus

  the command, we suggest you will create a clone of the current state.
  The size of the resulting vmdk would be slightly larger than the netto-data on the original disc.

  So if the Explorer inside the guest who would claim the 270 130 GB Gb serve the vmdk resulting could be as small as 140 GB.
  The exact size of the vmdk resulting isn't exactly predictable, but it is maybe much smaller than the original vmdk.

  The performance problem with the instant results from the mere fact that VMware should then read several files.
  It goes like this...

  GuestOS wants to read sector 100.00 on the disk = the first VMware audits if 100,000 area is inside the snapshot 2.
  If there is good - VMware check if this sector is inside snapshot1. If so very well - if not - VMware must also read the basedisk to find 100,000 sector

  This means that playback has several steps more than if you would use a vmdk préallouée without clichés.

  I generally recommend to use type growth basedisks if you know you want to make heavy use of snapshots

• How to shrink a pre-allocated VM?

  There are dozens of explanations on how do to reduce VMs grow-able.

  I have a virtual machine of 173 GB Windows 7 on my iMac OSX 10.6.6 hard drive. I also have a same size Bootcamp partition. The virtual machine may have been made from the version of Bootcamp, but it was long ago, a year or two, and who remembers.

  There is certainly a way for me to "shrink" the virtual machine. Or by literally shrinking, copying to another virtual computer or a copy in a newly formed virtual machine or its importation by using software such as Carbon Copy Cloner or Winclone, or some other 3rd party software.

  I would like some suggestions. Anything short of a new virtual machine and reinstall Windows (which is what I'll do if that proves to be the ONLY alternative).

  Thank you very much.

  How to shrink a pre-allocated VM?

  Hard disks VMware Fusion UI settings you can uncheck the disk space checkbox pre-allocate and then after VMware Fusion is finished to convert the disc you can use the narrowing of the VMware Tools, or you can even do as suggested by continuum, however study the following.

  If the VM in question was a partition Boot Camp that was imported by VMware Fusion then unless things have changes in VMware Fusion 3.x, the virtual hard disk created during the import is the size of the Macintosh HD, well the only software in the hard will be that of everything that was on the Boot Camp partition.  Take a look on Re: counterintuitive VMWare Instructions on resize virtual disk for additional information on the layout of the virtual hard drive in a Boot Camp Partition imported.

  Another approach would be just the Boot Camp partition real in the hard imported by itself to a new target with Symantec Ghost type hard or similar image and this is probably the way faster and easier with a stretch drive that has been reduced to a single operation.

  In addition, you can use VMware vCenter Converter Standalone or Paragon go virtual to create a new virtual machine or hard of the required type and too, this can simply be on the Boot Camp partition in the hard thus eliminating the EFI and HFS partitions + created during the import of the Boot Camp partition.