Just a few things that could could give you a problem especially if porting an existing mod to 1.5.

1) descr_ui_buildings.txt

In 1.2 there were two entries for carthage,

carthaginian eastern
carthaginian egyptian

Worked fine in 1.2 for both vanilla and new buildings but 1.5 doesn't like any multiple lookups here if the culture involved is trying to find a *new* building. This may include vanilla buildings that culture had no access to in the vanilla game. Can create same error for other factions if just add a second lookup for that culture.

This error can take three forms:

1) If no map.rwn file then you will get a KTM while trying to start a campaign.
2) If map.rwn exists then you either
a) crash on game start.
b) game loads but all regions have zero base fertility.

The presence or absence of certain graphic files in the carthaginian ui folder switched the a) or b) for me but i never worked out why.


2) descr_strat

1.5 gives a show_err over the win_conditions lines at the top of the 1.2 start file:

win_conditions
land_owner 20 100
land_owner 20 100
land_owner 20 100
land_owner 20 100
land_owner 20 100
land_owner 20 100
land_owner 20 100
land_owner 20 100
end_win_conditions


Only an issue if porting over an existing 1.2 strat file. Easy problem in a way as the show_err tells you the problem sort of but if you've messed with the 1.2 strat files a lot you might be so used to seeing those win conditions lines there that is takes ages to make the connection. (I ending up deleting almost the entire strat file in chunks before it clicked.)



3) name.txt/descr_names (found by teleklos)

In 1.2 the faction headers factions with two word names are in the form "romans julii", "greek cities" etc. In 1.5 they have an underscore instead of a space between the words. This causes a crash on load. Only likely to have this if porting an existing 1.2 modded names file.