LabView limitation : working with File 2 Go

Hi,
I'm acquiriring data in real time from several cards et high frequencies (102400 Hz).
The acquisition can last 10 hours and so the file can have size like 150 Go.
All labview file functions work with int32 to set offset, size of file... in byte.
How Can I do ?? (example : I have a 6 Go file : how can I know it's size with labview ???)
Eddy DUCHENE
12 F Chemin de Boutary
69300 CALUIRE ET CUIRE
[email protected]

educhene wrote:
I'm using a loop with Read Vi to seek in the file. It works well, But When my file is greater than 2 GB, I got a memory error (mémoire insuffisante pour terminer l'opération) when I try to read for example 263000 singles data.
This error appears when I want to read my 263000 values (not when seeking).
I don't understand why, because it runs well with a file less than 2 Gb even if I want to read more values.
Please find attached the example vi. Choose a file and run it : if your file size is less than 2 Gb (but have enough datas (ex : file size 10 Mb), it's ok, but if you run it with a file size more than 2 Gb you have the memory error.
Help please ...
As has been mentioned if you go to http://www.openg.org you will find in the File function Toolkit a library Large File Access, which works only on Windows as it calls directly into the WinAPI. Unlike other responses who said that the 2GB limit is a limit of the OS, Windows is actually able to work with larger file offsets. But LabVIEW currently does not make use of this option. The OpenG Large File functions mimic the LabVIEW low level FileIO functions but use a double precision floating point for all offset related parameters due to the lack of int64 support in LabVIEW.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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