Adding an instance of an HISM on a dedicated server causes an assert.
Regression?: No
This occurred in 4.20
[2018.11.14-17.05.25:773][ 61]LogWindows: Error: === Critical error: === [2018.11.14-17.05.25:774][ 61]LogWindows: Error: [2018.11.14-17.05.25:775][ 61]LogWindows: Error: Assertion failed: InstanceIndex == InstanceReorderTable.Num() [File:D:\matthew.clark_Main_Stream\Engine\Source\Runtime\Engine\Private\HierarchicalInstancedStaticMesh.cpp] [Line: 2203] [2018.11.14-17.05.25:775][ 61]LogWindows: Error: [2018.11.14-17.05.25:776][ 61]LogWindows: Error: [2018.11.14-17.05.25:777][ 61]LogWindows: Error: [2018.11.14-17.05.25:777][ 61]LogWindows: Error: [Callstack] 0x000007fefd3abded KERNELBASE.dll!UnknownFunction [] [2018.11.14-17.05.25:778][ 61]LogWindows: Error: [Callstack] 0x0000000140845f56 DedicatedHismBugServer.exe!FWindowsErrorOutputDevice::Serialize() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowserroroutputdevice.cpp:63] [2018.11.14-17.05.25:779][ 61]LogWindows: Error: [Callstack] 0x0000000140642977 DedicatedHismBugServer.exe!FOutputDevice::LogfImpl() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\misc\outputdevice.cpp:71] [2018.11.14-17.05.25:779][ 61]LogWindows: Error: [Callstack] 0x0000000140580409 DedicatedHismBugServer.exe!FDebug::AssertFailed() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\misc\assertionmacros.cpp:417] [2018.11.14-17.05.25:780][ 61]LogWindows: Error: [Callstack] 0x00000001427a54ed DedicatedHismBugServer.exe!UHierarchicalInstancedStaticMeshComponent::AddInstance() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\hierarchicalinstancedstaticmesh.cpp:2205] [2018.11.14-17.05.25:781][ 61]LogWindows: Error: [Callstack] 0x000000014281c890 DedicatedHismBugServer.exe!UInstancedStaticMeshComponent::AddInstanceWorldSpace() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\instancedstaticmesh.cpp:1801] [2018.11.14-17.05.25:781][ 61]LogWindows: Error: [Callstack] 0x000000013ff0c4d1 DedicatedHismBugServer.exe!ABP_HismTest_C__pf1010915279::bpf__ExecuteUbergraph_BP_HismTest__pf_0() [d:\a - user stuff\dedicatedhismbugmain\intermediate\plugins\nativizedassets\windows\server\source\nativizedassets\private\bp_hismtest__pf1010915279.cpp:473] [2018.11.14-17.05.25:782][ 61]LogWindows: Error: [Callstack] 0x000000013ff15f0e DedicatedHismBugServer.exe!ABP_HismTest_C__pf1010915279::execbpf__ExecuteUbergraph_BP_HismTest__pf_0() [d:\a - user stuff\dedicatedhismbugmain\intermediate\plugins\nativizedassets\windows\server\source\nativizedassets\public\bp_hismtest__pf1010915279.h:10] [2018.11.14-17.05.25:783][ 61]LogWindows: Error: [Callstack] 0x00000001409561f2 DedicatedHismBugServer.exe!UFunction::Invoke() [d:\matthew.clark_main_stream\engine\source\runtime\coreuobject\private\uobject\class.cpp:4862] [2018.11.14-17.05.25:784][ 61]LogWindows: Error: [Callstack] 0x0000000140b4e461 DedicatedHismBugServer.exe!UObject::ProcessEvent() [d:\matthew.clark_main_stream\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1480] [2018.11.14-17.05.25:785][ 61]LogWindows: Error: [Callstack] 0x0000000142275e3b DedicatedHismBugServer.exe!AActor::ProcessEvent() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\actor.cpp:719] [2018.11.14-17.05.25:786][ 61]LogWindows: Error: [Callstack] 0x00000001428e2074 DedicatedHismBugServer.exe!FLatentActionManager::TickLatentActionForObject() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\latentactionmanager.cpp:200] [2018.11.14-17.05.25:787][ 61]LogWindows: Error: [Callstack] 0x00000001428ce096 DedicatedHismBugServer.exe!FLatentActionManager::ProcessLatentActions() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\latentactionmanager.cpp:137] [2018.11.14-17.05.25:787][ 61]LogWindows: Error: [Callstack] 0x0000000142926cb2 DedicatedHismBugServer.exe!UWorld::Tick() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\leveltick.cpp:1513] [2018.11.14-17.05.25:788][ 61]LogWindows: Error: [Callstack] 0x00000001427882f0 DedicatedHismBugServer.exe!UGameEngine::Tick() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\gameengine.cpp:1364] [2018.11.14-17.05.25:789][ 61]LogWindows: Error: [Callstack] 0x000000013feeb4ae DedicatedHismBugServer.exe!FEngineLoop::Tick() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\launchengineloop.cpp:3699] [2018.11.14-17.05.25:790][ 61]LogWindows: Error: [Callstack] 0x000000013fef8850 DedicatedHismBugServer.exe!GuardedMain() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\launch.cpp:174] [2018.11.14-17.05.25:790][ 61]LogWindows: Error: [Callstack] 0x000000013fef88da DedicatedHismBugServer.exe!GuardedMainWrapper() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:145] [2018.11.14-17.05.25:791][ 61]LogWindows: Error: [Callstack] 0x000000013ff050c1 DedicatedHismBugServer.exe!WinMain() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:276] [2018.11.14-17.05.25:792][ 61]LogWindows: Error: [Callstack] 0x00000001441d03be DedicatedHismBugServer.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283] [2018.11.14-17.05.25:793][ 61]LogWindows: Error: [Callstack] 0x00000000772a59cd kernel32.dll!UnknownFunction [] [2018.11.14-17.05.25:794][ 61]LogWindows: Error: [Callstack] 0x000000007750385d ntdll.dll!UnknownFunction [] [2018.11.14-17.05.25:794][ 61]LogWindows: Error:
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-66500 in the post.