compiled for 1.12.x (no errors or warnings) and it hangs the load at 'loading part upgrades'  

@flart any suggestions?

Check if you have any copy of miniAVC.dll in your gamedata directory and delete it. It could be that it is also necessary to install zerominiAVC, although this is not clear.

@Tacombel Thank you -

I normally remove all those pesky miniavc.dll's using zerominiavc then the .xml files as well. Still found one that slipped through because I was testing Komplexity and needed Career Manager.

tried - removed everything except Squad (no DLC's) and MM and Kaboom... same.

• going to recopy my install to make sure it is up-to-date and fully clean
• Going to try recompiling with .NET 3.5 and then 4.7.2 and see if that is the issue. Don't believe it is.

‼️ well Bob's your Uncle and color me a 🍌 by a 🐒
🙈 🙉 🙊

well golly gee-whiz... compiling with .NET 4.7.2 seems to have resolved the issue.... was using .4.8

I think this can explain what is happening with the latest .NET version
https://forum.kerbalspaceprogram.com/index.php?/topic/203262-stuck-on-loading-part-upgrades-112/&do=findComment&comment=4003108

I think this can explain what is happening with the latest .NET version
https://forum.kerbalspaceprogram.com/index.php?/topic/203262-stuck-on-loading-part-upgrades-112/&do=findComment&comment=4003108
thank you @Tacombel

interesting. however in this specific case it was that .net 4.8 isn't supported in KSP; been having a [fileversion] in everything since 2019 in all the projects.