Yes!~ The Mission Group Name max length is 18 bytes.
Starting with patch 2.15 there is an issue when you click Practice Mission on the clipboard AND you have a mission in your library where the Mission Group Name attribute is too long. The newest mission editor won't let you save a Mission Group Name value that is too long, but the old missions already in circulation can still cause the WSOD error in the clipboard...
Some of my previously published, and previously functional missions will cause the error.
To resolve, either remove the mission from your catalog and contact the designer for a replacement. Or you can try to remediate the mission yourself by changing the Mission Group Name value each place it exists in the .mis file and rebuilding the .res file with the mission editor. Remember to rename the .mis file to match the new Mission Group Name value.
The very first line of the .mis file contains the Mission Group Name value. It is repeated at the end of each mission component in the file, and looks something like this:
[GROUPNAME]
hurricane_iic_firepower <------ this value is one byte too long
0x0 <------ this value changes each time mission resources are built.
[ENDGROUPNAME]
I defer to -sudz- of course for confirmation and qualification of my statements above.
