Look at

ON ERROR

Error() method

TRY/CATCH

http://msdn.microsoft.com/en-us/library/aa975615(VS.71).aspx
http://msdn.microsoft.com/en-us/library/fheb37ye(VS.80).aspx
http://msdn.microsoft.com/en-us/library/ms965448.aspx

>Hi, I have an error coming up on clients computer when running one task, and this error does not show up on my computer. The question is, how can I trap this error on a log file so I can find out which line number in the program and nature of the error. I'm sure you guys and girls have done this before and I need help. TIA