Jobs are not printing. The error shows as “TPWinPrn: Wrong Version of thinmon.dll”
An old TPWinPrn.dll file version could be located in file system. This can happen because of printer migration.
Printjob stays in Printer Queue of ThinPrint Printer object and in Eventlog an error is shown “TPWinPrn: Wrong Version of thinmon.dll” (see image below).
Any ThinPrint engine version
Check TPWinPrn file version located on system for old print processor files and delete the older one.