Hi Clement,
If the remote computer is only reading the measurement data files, then you can change the permissions such that that user of the remote computer only has Read permissions on the file. It sounds like the remote computer right now has both read and write permissions set on the file and it has a sort of mutex on the file while it is accessing it. If the permissions are changed such that the remote computer only has read access, then the PC that is needing to write the measurement data to the file can continue writing without any interruption since it will not lose the file resource when the other remote computer accesses the file.
Information regarding file sharing and setting file permissions on Windows XP can be found:
Microsoft KB 304040: How to configure file sharing in Windows XPHope this helps! Best of luck.
🙂Kileen