Opening of TDMS files larger than 500 MB in LabVIEW

Hello

We were faced with a problem when opening files TDMS connected using a LabVIEW, PDM Viewer (the vi in palette Advanced TDMS) application, or by creating a new PDM vi player. The recorder app is built using TDMS functions in palette file.

When the TDMS files are everywhere higher than 500 MB or the application hangs or crashes. It can sometimes give full error memory.

I browsed the forum and found the screws to split large TDMS files into smaller files and then open them. The other option is to use NI DIAdem. Currently, we use the option of the tiara. We do not want to modify the application to split the files into smaller sizes.

I'd like to understand why this is happening for files of these formats. I can easily play TDMS of 100 or 200 MB files.

The configuration of the system plays a role in the present? How is it that DIAdem can open the file and cannot LabVIEW?

request explanation

Thank you

Freelance_LV wrote:

[..]

What I want is to know if upgrade to Win 7 and LV 64-bit will solve this problem, without cut it files each time, or use the TDMS vi Viewer.

More likely since the channel data is placed in a very wide range and fragmentation of memory makes it very hard on 32 bit with LV 32-bit OS. Another thing that could be a problem on your 32 bit LV: display data as it creates a copy of data. So maybe the original data of the channel can hold in memory, but tries to display it sweeps away memory.

Another thing for 32-bit applications is to check the largest block of data you always free. Use tools like VMMap for your request of fragmentation of memory snapshot.

As I wrote already, a generic application 64 bit triggers the limited "insane" values depending on the operating system like Windows 7... still, there are limits.

Norbert

EDIT: The link of Windows 7 go to the physical memory table on the whole system. This does not reflect the virtual memory available to a single process. Scroll down to the table "and address space limits of memory" a virtual memory figure that can be assigned to a process 64-bit on Win7 x 64. The value is 8 to...

Tags: NI Software

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