Piff_paff

KSP: 1.12.3.3173 x64, Win10 Problem: Extreme lag in VAB/SPH after attaching pretty much any engine. Once I have an engine and fuel tank attached, when trying to attach any other part, the game gets extremely laggy. If I remove all the engines again, the game is perfectly fine again. No performance issues in flight. The problem didn't occur on a new game, only after quite some time in career. If I remove ScrapYard and OhScrap, the issue disappears, but if I remove only ohScrap and leave ScrapYard as is, then I still get the issue. Mods installed: Reproduction steps: in the problem description Log: In KSP.log, there's an enormous amount of duplicated log entries like: I could just remove ohScrap and ScrapYard, but I hate playing without them :| Update: After I removed both scrapYard, and ohScrap (cleaning all folders completely), and then reinstalled them, it looks fine, but I expect the problem will come back after some time.

Just to let you know - I'm experiencing a similar issue with a lot of mods: 000_Toolbar ActiveTextureManagement ASET ASET_Props AutoAsparagus BoulderCo CIT CommunityResourcePack Contracts Window CustomAsteroids CustomBiomes DeadlyReentry DistantObject EnvironmentalVisualEnhancements FerramAerospaceResearch FinalFrontier.dat FinePrint Firespitter JSI KAS KerbalJointReinforcement KittopiaSpace ksp-advanced-flybywire License.txt MagicSmokeIndustries MechJeb2 ModuleManager.2.5.1.dll ModuleRCSFX MP_Nazari NASAmission NavyFish Nereid OpenResourceSystem ORSResourcePack ORSX PartCatalog PartWizard ProceduralDynamics ProceduralFairings RealChute RealChute drag calculator.exe RealSolarSystem RemoteTech RLA_Stockalike SCANsat SDL2.dll SmokeScreen Squad StageRecovery sun_flare.tex.dds TacFuelBalancer TextureReplacer ThunderAerospace toolbar-settings.dat TreeLoader TweakScale UmbraSpaceIndustries UniversalStorage VNG WarpPlugin When I only have the Texture Replacer, but no Active Texture Management, contracts do show up, but the contracts interface is incomplete (the contract "buttons" are missing the graphical symbols). As soon as I enable the Active Texture Management, contracts are invisible altogether. This is using latest versions of both. I will test further this afternoon to find more possible conflicts.

Yes, I think I have found the source of the incompatibility. Removing the Modular Fuel Tanks mod fixed it for me. Will have to look for a solution that'd let me keep both of these mods though...

Latest: 0.9.0.9. However I have a strong suspicion it's a mod conflict - I just reinstalled KSP afresh and only added TAC LS and it seems to be working. Going to try adding mods one by one to find out the conflict cause. Will report back after I found it.

Yes, I've been having the same issue since 0.24 came out. I'm on 64bit windows version. Have not been able to find a solution yet.