Hi,
It appears when you use a mesh with **bIsDynamicObstacle ** on a spline the server will throw an error on start
See error below:
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error:
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 20 0x000000000231473e /home/Binaries/Linux/XServer() [0x231473e]
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 19 0x00007f7ef39471c1 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7f7ef39471c1]
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 18 0x00000000055a0194 CommonLinuxMain(int, char**, int (*)(wchar_t const*))
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 17 0x0000000002321677 GuardedMain(wchar_t const*)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 16 0x000000000231aa13 FEngineLoop::Init()
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 15 0x00000000046ba23e UGameEngine::Start()
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 14 0x00000000046e63d9 UGameInstance::StartGameInstance()
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 13 0x0000000004e45e70 UEngine::Browse(FWorldContext&, FURL, FString&)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 12 0x0000000004e49ccd UEngine::LoadMap(FWorldContext&, FURL, UPendingNetGame*, FString&)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 11 0x000000000422fde0 UNavigationSystem::OnWorldInitDone(FNavigationSystemRunMode)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 10 0x000000000422dd28 UNavigationSystem::ConditionalPopulateNavOctree()
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 09 0x000000000422ece0 UNavigationSystem::AddElementToNavOctree(FNavigationDirtyElement const&)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 08 0x00000000042083a1 FNavigationOctree::AddNode(UObject*, INavRelevantInterface*, FBox const&, FNavigationOctreeElement&)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 07 0x000000000427e00d TBaseStaticDelegateInstance<void (UActorComponent*, FNavigationRelevantData&)>::ExecuteIfSafe(UActorComponent*, FNavigationRelevantData&) const
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 06 0x00000000042acbe5 FRecastNavMeshGenerator::ExportComponentGeometry(UActorComponent*, FNavigationRelevantData&)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 05 0x00000000045b6ce5 USplineMeshComponent::DoCustomNavigableGeometryExport(FNavigableGeometryExport&) const
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 04 0x00000000024c413f FDebug::OptionallyLogFormattedEnsureMessageReturningFalse(bool, char const*, char const*, int, wchar_t const*, ...)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 03 0x00000000024d7965 FDebug::EnsureFailed(char const*, char const*, int, wchar_t const*)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 02 0x000000000247cb45 FLinuxPlatformStackWalk::StackWalkAndDumpEx(char*, unsigned long, int, unsigned int, void*)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 01 0x0000000002366315 FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: [Callstack] 00 0x000000000247cb7f FLinuxPlatformStackWalk::CaptureStackBackTrace(unsigned long long*, unsigned int, void*)
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: Stack:
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error:
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: Ensure condition failed: !NavCollision->bIsDynamicObstacle [File:G:\UnrealSourceBuilt\UnrealEngine-4.17.2-release\Engine\Source\Runtime\Engine\Private\Components\SplineMeshComponent.cpp] [Line: 1037]
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error:
[2017.11.15-02.14.47:160][ 0]LogOutputDevice: Error: === Handled ensure: ===