Rounding error causes a strange behaviour in comparisons

Hi all

I found a rounding error in my code yesterday, that apparently causes something impossible to happen. A comparison of one number in a superior has the value true, and the same comparison in a less than or equal to is also true. I've attached a zip with a VI test record and the values that produced the problem, in the README file. You only need to define Xa, Xb, newspaper, DEXfp, weight and DEXcon 5 min b/t Xa and Xb. None of the other controls on VariableCluster of importance, you will see when you open rule015 and rule016.

Well, it is a rounding problem, but it is preventable.

First of all, some backround. Comma floating itself has rounded up questions that are very well known and are an accepted matter. This is a resource for more information.

Your problem occurs because you have your computing operations in the same order for each comparison. You have (Wt * 6 * DEXcon_inv) in rule015, but (DEXcon_inv * Wt * 6) in rule016. Correspond to these levels of calculation to the other and see what happens.

Edit: For later use, you must use subVIs for calculations like that. This normalize the calculation in itself, so you don't meet for problems like this and it makes it also easier to make changes to your calculations in the future.

Tags: NI Software

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Date

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Status

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=========================================

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Windows Vista restarts automatically if your computer encounters an error that requires him to plant.
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Often drivers up-to-date will help, usually video, sound, network card (NIC), WiFi, part 3
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-------------------------------------------------------------------------

How to fix BlueScreen (STOP) errors that cause Windows Vista to shut down or restart
quit unexpectedly
http://support.Microsoft.com/kb/958233

Troubleshooting, STOP error blue screen Vista
http://www.chicagotech.NET/Vista/vistabluescreen.htm

Understanding and decoding BSOD (blue screen of death) Messages
http://www.Taranfx.com/blog/?p=692

Windows - troubleshooting blue screen errors
http://KB.wisc.edu/page.php?id=7033

-------------------------------------------------------------------------

In some cases, it may be necessary.

The Options or Vista recovery disk Startup Repair

How to do a startup repair
http://www.Vistax64.com/tutorials/91467-startup-repair.html

This tells you how to access the System Recovery Options and/or a Vista DVD
http://windowshelp.Microsoft.com/Windows/en-us/help/326b756b-1601-435e-99D0-1585439470351033.mspx

I hope this helps.

Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle="" -="" mark="" twain="" said="" it="">

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[ Nom ]

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EventRecordID

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Computer

Home-PC

Security

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CC44

9VP2ABEB

0000000005002800000000000300 DEC 0000000000000000000000000000000000000000000000000

Binary data:

In the words

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In bytes

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[ Nom ]

nvstor64

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[ Qualification ]

49374

Level

Task

Keywords

0 x 80000000000000

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[ SystemTime ]

2010-08-28 T 22: 24:17.869800000Z

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Channel

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9VP2ABEB

0000000005002800000000000900 DEC 0000000000000000000000000000000000000000000000000

Binary data:

In the words

0000: 00000000 00280005 00000000 C0DE0009
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These produce somewhat less often with about 47 errors an hour but these always down the computer to a fixed support and in some cases require a hard reboot.

Usually happens when I play a game like COD:MW2 but don't happen in games such as Mass Effect 2. It also happens if I play Runescape or if I look to multitask (have a game and a web browser open).

He only began to break over the last week, but is a gene.

Update the nForce storage driver. "A programmer is just a tool that converts the caffeine in code" Deputy CLIP - http://www.winvistaside.de/

Error caused by the overrided method object build

Hello world

When I build my Active blackberry Setup, I get the error:
```
I/O Error: Cannot run program "jar": CreateProcess error=2, The system cannot find the file specifiedrapc executed for the project MyApplication
```
This happens when I have this code:
```
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};
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};

vfmHeader.add(lblTitle);
vfmHeader.add(lblSubTitle);
screen.add(vfmHeader);
```
If I had to remove the method object overrided in the LabelField lblSubTitle, however, the build error does not. I tried to change a LabelField to a RichTextField lblSubTitle, and I still get the same error.

Very strange. Anyone know why this is happening? Thank you!

I found the solution to my problem here:

http://www.BlackBerryForums.com/rim-software/79668-JDE-build-all-problem.html

Basically, I removed all older versions of Java that I had and I installed this following:

J2SDK-1_4_2_15-windows-i586 - p.exe (JDK 1.4.2 version 15)
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JDK 1.5.0 is necessary because otherwise the JDE Eclipse plug-in will not start with 1.4.2.

Without having the JDK 1.6, however, the MDS - CS will organize not (within Eclipse). I had to manually download "BlackBerry email and MDS 4.14 Service simulators", start it and then run my application.

I hope this can help someone down the line...

Rounding error causes a strange behaviour in comparisons

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