Apparently in an update, I’d broken the MARCJoin function (the files to join wasn’t being set). Sorry about that. So, I’ve fixed this and in fixing this, corrected a problem with the same function in the console program.
To run in the console, you’d use the following:
%cmarcedit.exe -s c:\myfile.mrc;c:\myfile2.mrc -d c:\newfile.mrc -join
In the GUI, is on the main window, top menu under Tools/MARCJoin.
The update, as always, can be found at: MarcEdit50_Setup.exe.