sylario

No, the only thing dissepearing in my case is the part to be added, not the whole ship. Also I am also stuck in the VAB with the exit button with and without save that are unresponsive.

Sorry I thought the crash trace was enough. The log : https://gist.github.com/bsylvain/d82e466c2c2dbb79a246b087a0c74ed6

build id = 03045 - Game reinstalled and file checked - No mod installed. In career mode, after the very first flight with 3 mystery goo, I have enough science to unlock the 2 first elements of the research tree. In the rocket editror, I put a control pod and a decoupler. When I try to add the (only) fuel tank, it fails. The fuel tank diseapear, and now I cannot select an existing part. I also cannot exit the VAB. The logs are the following : EDIT: Full log : https://gist.github.com/bsylvain/d82e466c2c2dbb79a246b087a0c74ed6 [UIMasterController]: ShowUI (Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 35) fuelTankSmallFlat added to ship - part count: 2 (Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 35) Uploading Crash Report NullReferenceException at (wrapper managed-to-native) UnityEngine.Object.GetName(UnityEngine.Object) at UnityEngine.Object.get_name () [0x00001] in <5aeafee3fea24f37abd1315553f2cfa6>:0 at PreFlightTests.StationHubAttachments.TestCondition () [0x0003f] in <f8bc9e2b903e48a5b248ab0083c07c62>:0 at PreFlightTests.DesignConcernBase.Test () [0x00000] in <f8bc9e2b903e48a5b248ab0083c07c62>:0 at KSP.UI.Screens.EngineersReport+TestWrapper.RunTest () [0x00006] in <f8bc9e2b903e48a5b248ab0083c07c62>:0 at KSP.UI.Screens.EngineersReport+<RunTests>d__49.MoveNext () [0x000bb] in <f8bc9e2b903e48a5b248ab0083c07c62>:0 at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00027] in <5aeafee3fea24f37abd1315553f2cfa6>:0 (Filename: <5aeafee3fea24f37abd1315553f2cfa6> Line: 0) The same parts in sandbox mode have no problem at all.