Danh,
I don't believe that your problem can be solved with the information you have provided unless someone else has experienced the same symtpoms which coincidentally have the same cause as in your case.
Is there any other information you can provide that can help localize the problem?
1) What is happening when the error occurs?
2) Does the error always occur in the same place?
3) Does it always occur with use of certain resources (e.g. DAQ, GPIB, VISA, printer)?
4) Does it occur when using the sequence editor?
5) Does it occur when using one of the shipping operator interfaces?
6) Does it occur only when using your operator interfaces?
7)Is it related to a specific sequence or any sequence?
😎 Does it happen when you executed your sequence with/without a process model entr
y point (i.e. Execute>>Test UUTs, Execute>>Singal Pass or Execute>>Run MainSequence)?
9) How often does it happen?
10) What version of TestStand are you using?
11) With what language (include versions) are you programming your code modules?
12) With what language (include versions) are you programming your operator interface?
13) Is there any error code reported with this error message?
14) Is this error reported in a TS run-time error dialog or is it reported directly 1by the operating system?
15) Have you searched the web for related errors? For example, the following link describes a particular programming mistake that can lead to this error
http://support.microsoft.com/support/kb/articles/Q125/7/49.asp
By investigating answers to the above questions you may be able to narrow the cause of this error, which might allow you or others to help solve the problem.