If this is already mentioned somewhere, forgive me. These forums are densely packed with responses and I don't have the time to read everything.
Randomly but often get this error while generating previews for a map with a river on it. If I try to load a map after getting this error, it will boot me back to main menu.
Failed to find all necessary river flow data
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Log:ErrorOnce (string,int)
RimWorld.GenStep_Terrain:GenerateRiverLookupTexture (Verse.Map,RimWorld.RiverMaker)
(wrapper dynamic-method) RimWorld.GenStep_Terrain:RimWorld.GenStep_Terrain.GenerateRiver_Patch2 (RimWorld.GenStep_Terrain,Verse.Map)
System.Reflection.MonoMethod:Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo)
System.Reflection.MethodBase:Invoke (object,object[])
MapReroll.MapPreviewGenerator:GeneratePreviewForSeed (string,int,int,bool,MapReroll.MapPreviewGenerator/ThreadableTexture)
MapReroll.MapPreviewGenerator:DoThreadWork ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()
Hugslib: https://gist.github.com/f202537db120544b540a74ac22f70cbe
Randomly but often get this error while generating previews for a map with a river on it. If I try to load a map after getting this error, it will boot me back to main menu.
Failed to find all necessary river flow data
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Log:ErrorOnce (string,int)
RimWorld.GenStep_Terrain:GenerateRiverLookupTexture (Verse.Map,RimWorld.RiverMaker)
(wrapper dynamic-method) RimWorld.GenStep_Terrain:RimWorld.GenStep_Terrain.GenerateRiver_Patch2 (RimWorld.GenStep_Terrain,Verse.Map)
System.Reflection.MonoMethod:Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo)
System.Reflection.MethodBase:Invoke (object,object[])
MapReroll.MapPreviewGenerator:GeneratePreviewForSeed (string,int,int,bool,MapReroll.MapPreviewGenerator/ThreadableTexture)
MapReroll.MapPreviewGenerator:DoThreadWork ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()
Hugslib: https://gist.github.com/f202537db120544b540a74ac22f70cbe