Custom scenario 'Weserubung 1940' crashes

[Erik2]

This a very detailed 1km/hex with 174 Axis and 346 Allied units on a 165,264 map. It is a replacement for the Norway scenario.
The scenario validates OK.
In play there appears to be some graphical glitches in a certain area of the map.
Also there is no strategic map.
Hitting next unit repeatedly causes the units in the affected map area to eventually show in the side-bar, but the particular map area is not displayed. At some point the scenario crashes while hitting next unit.

Any tips?
I have tested in on 2 Win7 PCs and one WinXP.

Thanks
Erik

[Razz1]

You are missing some terrain tiles

[Erik2]

You are missing some terrain tiles

I double-checked the terrain after removing all overlays etc, but there are no 'black holes'.
The program warns you when you save if there are missing tiles, no warning when saving this scenario.
I exchanged a couple of non-used port tiles with deep sea, but no cigar yet.

Erik