I ran across the same problem you are describing a year or so ago, it seemed the song file somehow got corrupted and wouldn't play. At that point I couldn't find any way to recover, other than delete the file and start from scratch.

Can you duplicate the problem on a predictable basis, is there a specific sequence of events that cause it to happen every time? I wasn't able to when it happened to me.

If so you can, contact support about it and report a bug. Or even send them the sgu file, they could maybe figure it out from that.

Last edited by BlueAttitude; 09/29/18 07:48 AM. Reason: Better English :P