[OK AFTER RESTART] error message when attempting to delete a unit

[orca]

In scenario editor I'm getting an error message when I try to delete units. It started when I tried to delete unit #2482 (russian jammer/elint vehicle). It seems like the error occurs for all units I try to delete. Strangely the units I tryto delete seem to be deleted but replaced by a #2482 unit. I'm using the keyboard delete key.

saved game attached

[orca]

Not sure why but I quit command and restarted and no longer get the error message. Maybe it was my computer and not the game....