This isn't a bug.
I loaded very old game (maybe 86.09 or so), but it failed to replace some objects and simutrans crashed.
I added them to compat.tab, and it could be loaded.
These four items below caused to crash.
This item below was removed.
Thank you. Somehow my compatb.tab did crippled during the last months and the moving, it seems.
Patricks_Rock is still there. Hmm.
The crash is probably rather a simutrans error, if there is a building requested with a too high level. I will look into it.
I apologize. Yes, it is, and my compat.tab was a little broken.
Okay, I re-installed rev87, and Patricks Rock is Okay now. Thanks.
"MJHN Deltic" problem is this. simutrans stops at here.
One more problem is old "Doubledeck city bus". It was replaced by "Gelenkbus_Ende".