Error message when adding pipework

[Anonymous]

Hi there

We are using MEP 2011 and have produced a large plantroom drawing. We have gone in to make some revisions and are finding we cannot draw 40mm pipe each time we try we get the error message "Invalid Enum Map String: Undefined_C??" ( The question marks represent what appears to be obscure symbols). Once this error appears we have to crash out of Autocad. We have no idea what the error relates to or where we shoulg go to put things right . Does anybody here have any ideas?

Thanks

Colin

[Martin__Schmid]

The Invalid Enum typically happens when there has been an invalid entry in your catalog... I would suggest logging a support request for a technician to help you diagnose.