Welcome to the site.  There can be many reasons for what you describe, so it is nearly impossible to know why.

In general, my advice is to start with just one change at a time.  Start with a mission.lvl mod, just putting a different unit into a stock map.  If that works--then take the next steps.


Some items you can include in a follow up post:
   -what version of SWBF2 are you using (steam/GoG/DVD) and actual version number if you can find it
   -your OS version (i.e. Windows 10, etc.)
   -the path of your game (folder location)
   -the link to the mod tools you are using

I will add more if I can think of more later.

 

steam/gog is based on 1.3 beta and has a higher limit of mod maps (I dont recall the number, but more than 100 I believe)

Not sure about the fix, but i think there is already a model somewhere
http://www.swbfgamers.com/index.php?action=downloads;sa=view;down=373

same as the post above yours:  https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=894

All of the assets are in the mod tools and you were told where it is located.

Using the un-munge tool to retrieve a stock asset is like buying a car and tearing it down for the hubcaps.

But hey, you do you.

use the mod tools, not un-munge

assuming SWBF2 use

http://www.swbfgamers.com/index.php?action=downloads;sa=view;down=436

https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=319

check over the tutorial section; post if you need help, but read directions first; also helps if you know how to use a computer, as in command window/batch file stuff

1.3 was always a half baked beta and still is.

I don't know what wasohs coversion kit is (is there a link to it on this site?).  I recommend you use one of ours.

Also note that modmaps can give issues for every version.   

http://www.swbfgamers.com/index.php?topic=13356.0

http://www.swbfgamers.com/index.php?topic=12443.0

There are a few issues here--

this file already exists as a previous download--please be sure to search for existing maps
http://www.swbfgamers.com/index.php?action=downloads;sa=view;down=105

Hi dsaf, please use only one account.

Good to see you Seraja...hope you have been well.

here
https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=380

I see the issue now...it points to MPCgamers.com to the file named:  EAG1 folder.rar


I can search some more in my archive.  If someone else has it let me know.