Save is on 10th Opal year 253, CTD is by 14th Opal - repeats every time.

Crash text is:

Fortress mode Version 52.02
0> Dwarf_Fortress+0xA7F136
1> Dwarf_Fortress+0xA7F2D9
2> KERNELBASE!UnhandledExceptionFilter+0x1F3
3> ntdll!strncpy+0x13CF
4> ntdll!_C_specific_handler+0x93
5> ntdll!_chkstk+0x9F
6> ntdll!RtlWow64GetCurrentCpuArea+0xC17
7> ntdll!KiUserExceptionDispatcher+0x2E
8> Dwarf_Fortress+0x130D167
9> Dwarf_Fortress+0x136A433
10> Dwarf_Fortress+0xD6D3FF
11> Dwarf_Fortress+0x10D697
12> Dwarf_Fortress+0x11964C
13> Dwarf_Fortress+0x147E6E0
14> Dwarf_Fortress+0x877D3C
15> overlay_plug+0x1C11C
16> Dwarf_Fortress+0xBE0AB5
17> Dwarf_Fortress+0x8A447F
18> Dwarf_Fortress+0x8A5969
19> SDL2!SDL_DYNAPI_entry+0x799D7
20> SDL2!SDL_DYNAPI_entry+0x12EEDE
21> ucrtbase!wcsrchr+0x150
22> KERNEL32!BaseThreadInitThunk+0x17
23> ntdll!RtlUserThreadStart+0x2C