Dealing with an Error...

Im running windows 2k, and i sent an application to my friend that i created who is using windows xp -- all this application does is read and write on random access files, and uses some global variables.. but he keeps getting this message:

"Automation error - object invoked has been disconnected from its clients."

I don't know what could be cause of that-- since i dont have that problem on my computer? Could it be i have .dll he doesn't? I dunno what to do to fix this?:confused:

if you can help! thanks!!