I don't know... the size actually should not matter. What is loaded when a module is loaded is what exists in the module. Same with areas. If my campaign has 200 areas, a module alone will load 20 for example. So size shouldn't matter here
. Now the OC, their campaign is only 7mb because it only has some dialogues, scripts and icons. Our space is taken by mdbs and dds... mostly.
Something came to mind, but it could be complete gibberish. The 2da files you use, have actually numerous lines. Do you think this could be a problem? I mean I use the same... and no problem occurred. But you never know. Maybe the game has trouble recognizing all these resources, not size wise, but information wise which is 2da. Try removing just the 2da and see if it works. The journal is not related of course, but just a try.