TRD_Theddy

@jimmymcgoochie Thanks for the tip! OMG I tried a lot of thing and it finally worked! Some parts that I never use ( drop tanks) of the OPT Legacy mod (that I almost never use) were causing the problem. So I just removed the problematic files and everything works like I wanted Thanks for your help!!

jimmymcgoochie The mod I wanted to use is the Shuttle Orbiter Construction kit. It is a bit old but I know it can at least work like almost completely without B9 Partswitch : two separated parts are stacked as one unique part, but its the only issue I had until I decide to put B9 Partswitch again in the files to see if it will solve the problem, but the fatal error happend. I use the last version of KSP (1.9.x I suppose) the mods that I use are : Firespitter, OPT/OPT Legacy, ToolbarControl, RasterPropMonitors, Kerbal Reusability expansion, KSP Wheel, Mk2 Expansion, Planetary Baselnc, the hole ASET bundle (Landinglegs/Props/Advanced IVA) I tried to find the file you mantionned but it seems to not exist When I try to research it it finds it but I still cannot open it

Hello everyone, a few months ago I started to download some mods for ksp and everything went fine until I decide to get one that needs B9 Partswitch to work. I then realize that B9 was already installed and I just launch the game but I see afatal error report with multiple thing apparently missing. I download the last update of B9 partswitch and it almost works completely : there is one last thing considered missing and this is a tank type named "Optab". My problem now is that I just don't know how to get this working I will be thankfull for any help