The program (Swift Publisher 4 ) will open with the welcome panel and a blank page. When I try to open an existing document it will appear for a few seconds and then SP crashes. The crash report that comes up includes:
Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteScanner scanUnsignedLongLong:]: unrecognized selector sent to instance 0x7f81e40b2890'
terminate called throwing an exception
Not being a programmer, I have only a vague idea what that means but hope it gives enough info to help me get round this...
I have saved the full crash report as a TextEdit doc.