>This error just popped up in an application that has been running unchanged for over a year. The error "Invalid Buff Dirty Call" pops up when attempting to print labels or reports. There is no help available. Any suggestions?

This problem has come up in connection with the Class Brower (see MS KB article Q247248). In that case it has to do with the corruption of the table used by the Class Browse (BROWSER.DBF/FPT). The only other place I've seen mention of it is in a list of error messages associated with the VFP ODBC driver. In both cases, the problem seems related to table corruption.