It sounds like you are most likely have to huge of a number in a calculatioin. Put SET STEP ON just before the problem code. Step through keeping an eye on the variables in the calculation and watch for unexpected and unexpectedly large values.

>My application is giving me a numeric data overflow error after we've just processed a new run of data.
>
>It appears to be placing funny characters in one of the
>fields - llllllllllllllllll
>
>This is a character (60) field.
>
>Does anybody know what could be causing this error?
>
>How can I replace this with blanks when I don't know what it represents?
>
>Any input would be appreciated.
>
>Thank you.