>I use Groupwise Object functions to open a new mail window. I call a function that acepts two strings for parameters. It works in one computer, but it gives an error message in another computer. The error message is "Function argument value, type or count is invalid".
>When I use a simple VB program to do the same thing, it works in every computer.
>So I think it is not dll problem (it works in another language).
>Any suggestion is greatly appreciated.

Can you post a relevant foxpro code here?