In many cases it is up to programmer to create an onerror routine. Then you would show to the user and/or document on what line and in what subroutine the error occured.

Like:
on error do iError

*-----------
Procedure iError
=strtofile("Error on line "+trans(line())+chr(13)+message(), "error.log")
*other stuff should go here
CANCEL


>Greetings,
>
>A customer reports getting this error: "Program
>Error- API library is not found". What file or files are missing. Why doesn't FP supply a file name with this error - sure would make it easier!