Advice needed (functions_filters.asp)

dj air wrote: is there a certain line within the page you where getting it?

That would be too easy :):)
I will try to remove one formating at a time, in effort to discover the problematic field.
Most users do not experience this problems, but some other do.
Once all old users wil reactivacte their account i hope this error will not show up again.

Thanks

Thank you for the post.

I wasn't clear apparentlly and I apologize for that.
I have coded a small aplications to notify me about server errors. I know the lines that is causing the error and those are in filter_function.asp file. However, that file is "hosted" by common.asp that is hosted by most forum pages so, i can't find the line in resistration.asp file that is causing invalid call for format funcrion; only the line inside filter_functon.asp file).

I have done some if not null checks (inside filter_function.asp)  and it seems to work now. I will remove this additional check as soon most old users reactivate thir account.

Thanks