Write File stops at 152 Mb

[Qualle]

When using the "Write file" option in LabView 7.1 the maximum file size of the binary file is 152 Mb. When this size is reached the program always hangs and claims that "Data was overwritten before it could be read by the system." (I do use DMA)

A solution would be to write to multiple files. I tried that using the "Write LabView Measurement File", but this way of writing to file based on ascii is simply too slow.

I'm happy if someone has a good solution.

/Qualle

[TCPlomp]

Could you show your code?

Because I've never seen this.

You might want to flush the file regurarly

Ton

[altenbach]

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@Qualle wrote:

"Data was overwritten before it could be read by the system."

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I am not familiar with that error. Is this coming from LabVIEW or the OS?

You might also want to check your drive for errors and possibly defragment. How much disk space do you have left?

[Qualle]

You can find the relevant part of the code in the attachment. The code collects data from a NI-6602 and reads the value of the 80 MHz clock on each pulse that enters one of the gates.

I use WinXP with NTFS so the system should be able to handle large files.

The hard drive is in good shape and there is plenty of free space.

Thankfull for your advices!

/Qualle

[Qualle]

Yes, the error message comes from LabView.

/Qualle

[Neil.Pate]

Is there anything else going on in the while loop? It looks like there is some file access at the top which is cut off in your screencap.

[Qualle]

Yes, I'm collecting data from two gates so there is a copy of the same code above.

It just didn't fit in one screen shot...

[GerdW]

Hi Qualle,

"It just didn't fit in one screen shot..." - cleaning up the diagram (just a little bit) would help in this case

The attached vi quickly run up to >300, writing >300MB of data, without any problems in just some seconds...

Message Edited by GerdW on 08-23-2007 02:33 PM

Message Edited by GerdW on 08-23-2007 02:37 PM

[Neil.Pate]

I assume when your file stops writing at 152 MB that there is actually still data to write from the DAQ? i.e. does your buffer size indicator show there are some samples to be written to file?

[Qualle]

Yes, the buffer goes from a constant low value to sky rocheting when reaching 152 Mb.