If it can help
1) Beware, to the unwanted tab and two waste spaces
Cf. line 23 after "- XBASE3" (see 1st screen hot)
2) The keyword "terrains:" is missing (see 2nd screen shot)
3) I added a size of 2 for Fortress, but I think it lacks some blocks : doesn't it need NW, NE, SW and SE ? (see screen shot 3 and 4)
4) Regarding Security Room, it seems not possible to go upstairs (the small door opens, but path seem to be blocked just behind this small door)
5) Regarding Security Fortress, even if only one corner is visible, it seems some sprites are missing (walls with a window)