Hello.
With expanded_ubase_reworked-1.3 installed almost every time when i'm playing alien base with silacoid i have same issue: stucked silacoid.
In first save silacoid fell down to unreachable place after burning floor tile, you could blow it up with high explosive.
In second save i was unable to find where it stucked but place contains visible unreachable zones(and i saw many unreachable places in other raids on alien bases).
In save 3 i found a place where silacoid stucked(soldier can't step on corner tile that marked in screenshot) and blown it up, but the beast survived.
In save 3.1 you could see how silacoid apears from nowhere after ending turn.
Also, i found that grenades explodes 1 turn early than it should: if i prime for 3 turns it exlodes right after second, if for 4 - after 3 turns and so on; i can't remember was such issue in vanilla or not, because i don't use delayed granades normally.
I just took a look at the savegame files:
- "Aliens_Pick_Up_Weapons ver: 1.0"
- "Advanced_Medikit ver: 1.0 Final"
- "Alternate_Lightning_Thunder ver: 1.12 Final"
- "Expanded_Terror_Reworked ver: 1.2 Final"
- "Skystriker ver: 1.0"
- "darkened-ufo-vanilla-variants ver: 1.2"
- "expanded_ubase_reworked-1.3 ver: 1.3 Tactical Maze!"
- "support-drones ver: 1.0"
- "hm-scout-drone ver: 1.0"
All these mods are not needed to play hardmode, they are already a integrated part of it.
EDIT: Sorry for the delay, i rechecked the map modules in question on which you reported the stuck silacoids.
The maps itself do not have errors and the tiles are placed correctly.
What you call unreachable section, is reachable for units which can fly. E.g. for floater aliens or your own men when they have flying suits. The mapscript is tailored that only one of these modules should ever occur on a alien base map.
But since you mixed the mods i can not tell for sure, if the mapscript is still working as intended.
I recheck the MCD files for the fire resistance...
EDIT2:
After rechecking, i am using the vanilla file for the base ground tiles...
I increased the fire damage in the mod, this may lead to the fact that Silacoids can destroy groundtiles in alien bases.
Please use the attached U_BASE.MCD files. Just extract the zip and drop the files in the TERRAIN folder of Hardmode Expansion that should fix the issue occuring. (This will not work with battlescape savegames!)