Has anyone out there ever encountered problems using the sys(3050) function?

Recently I added the following code to my application in an effort to improve performance:

=sys(3050,1,Val(sys(3050,1,0)) / 3)

Since that time my app has been experiencing periodic header corruption in a specific table. The table is part of a DBC and the application updates it using optimistic row buffering. I have not yet been able to re-create the probelm.

The main symptom is a 'record out of range' message.

The app was created using VFP 5.0a and runs as an EXE on a novell 3.12 network. The shortcuts to the EXE reside on NT 4.0 workstations running SP3.

I did find one MS article (ID Q164385) that mentions possible file corruption when using the sys(3050) function.