Andrus,
Have you considered putting your EXE on each user's computer instead of leaving it on the network? There's a good Wrapper program in the Files section by Nick Neklioudov

http://www.levelextreme.com/wconnect/wc.dll?UniversalThread~?2,54,19,1186

Also, do you have any other "Set Procedure" files? If so, be sure you use the "Additive" clause.

HTH
Barbara

>I have seen this error in users logfiles. It is not possible
>to reproduce it it occurs randomly.
>
>There are actually two such functions which are called often.
>One is I() translation like in INTL toolkit. All program messages (including
>all in menu designer) are passed through it.
>My form queryunload asks for save and this error occurs.
>
>Second is used to control user access level.
>It is called from from load to check to allow opening of this form
>by user. In this case, the error occurs.
>
>I have set procedure and set classlib commands in my program.
>
>I think maybe this is related to bad network connection:
>My program is a big exe file residing in a network server and
>maybe exe faile reading fails sometimes.