>I am seeing this error -
>
> Error 2028: API call caused an exception
>
>when calling the Encrypt() function in Cipher50.fll. It is somewhat sporadic, depending upon the environment. I wonder if anyone else has seen this or knows anything about what might cause this problem.
>
>When it occurs there seems to be no problem in the parameters sent to the function. If I capture from our error log the parameters that were sent at the time of the error and send them to Encrypt later from the command window it works fine.

You may try VFP implementation of the Chipher encryption FAQ #27613