Hi,

We keep receiving intermittent "Unexpected Crystal Reports Errors" which either comprise of "Invalid Printer Specified" or "The handle is invalid". Despite reinstalling the label printer drivers with newer version, trying an IP connected label printer or USB it makes no difference. We are using a x32 bit ODBC driver and SAP Crystal Reports runtime engine for .NET Framework x32 13.0.37.5230.

We have tried using both the EPL and ZPL Seagull drivers to no such luck.

Solved: Unexpected Crystal Reports Error: Invalid Printer ... - SAP Community