railguns currenly broken, working on fixing. this is somehow related to the B@R system.

steam://openurl/https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1475749133
use this mod to to get railguns, its just duck tape till find as better fix. the rail gun dont play good with my other files.

crash when placing small grid nanobot build and repaitr system
2018-09-05 15:56:19.839 - Thread: 1 -> Exception occured: System.InvalidCastException: Unable to cast object of type 'Sandbox.Definitions.MyCubeBlockDefinition' to type 'Sandbox.Definitions.MyShipToolDefinition'.
at Sandbox.Game.Weapons.MyShipToolBase.LoadDummies()
at Sandbox.Game.Weapons.MyShipToolBase.Init(MyObjectBuilder_CubeBlock objectBuilder, MyCubeGrid cubeGrid)
at SpaceEngineers.Game.Entities.Blocks.MyShipWelder.Init(MyObjectBuilder_CubeBlock objectBuilder, MyCubeGrid cubeGrid)
at Sandbox.Game.Entities.Cube.MySlimBlock.Init(MyObjectBuilder_CubeBlock objectBuilder, MyCubeGrid cubeGrid, MyCubeBlock fatBlock)
at Sandbox.Game.Entities.MyCubeGrid.AddCubeBlock(MyObjectBuilder_CubeBlock objectBuilder, Boolean testMerge, MyCubeBlockDefinition blockDefinition)
at Sandbox.Game.Entities.MyCubeGrid.AddBlock(MyObjectBuilder_CubeBlock objectBuilder, Boolean testMerge)
at Sandbox.Game.Entities.MyCubeGrid.BuildBlock(MyCubeBlockDefinition blockDefinition, Vector3 colorMaskHsv, Vector3I min, Quaternion orientation, Int64 owner, Int64 entityId, MyEntity builderEntity, MyObjectBuilder_CubeBlock blockObjectBuilder, Boolean updateVolume, Boolean testMerge, Boolean buildAsAdmin)
at Sandbox.Game.Entities.MyCubeGrid.BuildBlocksSuccess(Vector3 colorMaskHsv, HashSet`1 locations, HashSet`1 resultBlocks, MyEntity builder, Boolean instantBuilt, Int64 ownerId)
at Sandbox.Game.Entities.MyCubeGrid.BuildBlocksRequest(UInt32 colorMaskHsv, HashSet`1 locations, Int64 builderEntityId, Boolean instantBuild, Int64 ownerId)
at VRage.Network.MyReplicationLayerBase.InvokeLocally[T1,T2,T3,T4,T5,T6,T7](CallSite`7 site, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7)
at VRage.Network.MyReplicationLayer.DispatchEvent[T1,T2,T3,T4,T5,T6,T7,T8](CallSite callSite, EndpointId recipient, T1& arg1, T2& arg2, T3& arg3, T4& arg4, T5& arg5, T6& arg6, T7& arg7, T8& arg8)
at VRage.Network.MyReplicationLayerBase.RaiseEvent[T1,T2,T3,T4,T5,T6,T7](T1 arg1, T7 arg7, Func`2 action, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, EndpointId endpointId)
at Sandbox.Game.Entities.MyCubeGrid.BuildBlocks(Vector3 colorMaskHsv, HashSet`1 locations, Int64 builderEntityId, Int64 ownerId)
at Sandbox.Game.Entities.MyCubeBuilder.AddConstruction(MyEntity builder)
at Sandbox.Game.Weapons.MyBlockPlacerBase.Shoot(MyShootActionEnum action, Vector3 direction, Nullable`1 overrideWeaponPos, String gunAction)
at SpaceEngineers.Game.Entities.Weapons.MyCubePlacer.Shoot(MyShootActionEnum action, Vector3 direction, Nullable`1 overrideWeaponPos, String gunAction)
at Sandbox.Game.Entities.Character.MyCharacter.ShootInternal()
at Sandbox.Game.Entities.Character.MyCharacter.UpdateShooting()
at Sandbox.Game.Entities.Character.MyCharacter.UpdateAfterSimulation()
at Sandbox.Game.Entities.MyEntities.<UpdateAfterSimulation>b__f(MyEntity x)
at VRage.Collections.MyDistributedUpdater`2.Iterate(Action`1 p)
at Sandbox.Game.Entities.MyEntities.UpdateAfterSimulation()
at Sandbox.Game.World.MySector.UpdateAfterSimulation()
at Sandbox.Game.World.MySession.UpdateComponents()
at Sandbox.Game.World.MySession.Update(MyTimeSpan updateTime)
at Sandbox.MySandboxGame.Update()
at Sandbox.Engine.Platform.Game.UpdateInternal()
at Sandbox.Engine.Platform.Game.RunSingleFrame()
at Sandbox.Engine.Platform.FixedLoop.<>c__DisplayClass1.<Run>b__0()
at Sandbox.Engine.Platform.GenericLoop.Run(VoidAction tickCallback)
at Sandbox.Engine.Platform.Game.RunLoop()
at Sandbox.MySandboxGame.Run(Boolean customRenderLoop, Action disposeSplashScreen)
at SpaceEngineers.MyProgram.Main(String[] args)
2018-09-05 15:56:19.841 - Thread: 1 -> Hiding window
2018-09-05 15:56:19.841 - Thread: 1 -> Hiding window done
2018-09-05 15:56:19.841 - Thread: 1 -> Showing message

thanks for letting me know, fix will be in a update later today