CTD if putting more than 21 units into the same control group

Hey, I always get a CTD when I put more than 21 units into the same control group (with "CTRL+1") on the battle map. Any way to prevent that?

And yes, it indeed is possible to have more than 20 units in one army, if you edit the savegame accordingly.

It is a well known issue in ETW. There have been no solutions. Do not Ctrl+A, with 22+ units or it will crash.
NTW and forth do not have that issue, but ETW does.

I do not know if that problem is there for ships though. I have not tested it.

Alright, sad but now I know. Cheers! :-)