GP4 Builder: file corrupt after sorting car objects & saving

Title basically says it all. I open a car shape with GP4 Builder, sort the car objects, save it, close the file. When I try opening it again I get this message




Can't import it to zmodeler any longer either, here I get the invalid header message.



Edit: only seems to happen when I use the 'save' option, chosing 'save as' seems to be working fine.

---

Some mods
F1 1996 | F1 2002 | F1 2007 | F1 2011 | F1 2013 | F1 2015 | F1 2018



Edited 1 time(s). Last edit at 12/20/2018 06:30PM by kedy89.

Capital GP4. Rename to .gp4 and it should be fine.