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P3D v4 Unable to create BGL file - error illegal name character

I am sharing this because I found my own solution, and it was so crazy obvious that I am actually embarrassed.

2023-11-19 09_49_58-ModelConverterX - TaxiSignApronL.mdl - TaxiSignApronL.png

I had no issues at all converting this to a MDL file but I was getting frustrated not being able to use MCX to create a BGL file. Checked all the SDK locations, etc.

What was crazy was that I really had no trouble generating BGL files for other 3d models. So it had to be something with THIS model?!!!

Went back trying everything to modify the model, texture names, settings, etc.


It was the location folder. I used a special character in the folder name (see above - taxi signs & other). That is all it was.

Finally, after spending all weekend on it, I finally saved it to another location and voila.

Mentioning this here just in case somebody else is looking, like me, for some technical solution when really it was just this.


  • 2023-11-19 09_49_58-ModelConverterX - TaxiSignApronL.mdl - TaxiSignApronL.png
    2023-11-19 09_49_58-ModelConverterX - TaxiSignApronL.mdl - TaxiSignApronL.png
    57.2 KB · Views: 45
Isn't it lovely all the restrictions that MS put into the SDK tools :D