I found this error, it is somehow related to the population of fractions.
Error in WorldGenStep: System.NullReferenceException: Object reference not set to an instance of an object
at
)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean

, Object)
System.Threading.ThreadHelper:ThreadStart()



Exception from asynchronous event: System.NullReferenceException: Object reference not set to an instance of an object
at
ive always used.


There was an exception thrown by the PawnGenerator during generating a starting pawn. Trying one more time...
Exception: System.NullReferenceException: Object reference not set to an

FinishOff

Could not find class AllowTool.Settings.WorldSettings while resolving node li. Trying to use

Could not do PostLoadInit on Verse.AI.Group.Lord: System.NullReferenceException: Object reference not
reference not set to an instance of an object
at Verse.AI.Group.Lord.LordTick () [0x00000] in <filename unknown>:0
at Verse.AI.Group.LordManager.LordManagerTick () [0x00000] in <filename unknown>:0
at

this part of the error log as the possible problem area:

System.NullReferenceException: Object reference not set to an instance of an object
at Verse.GridsUtility.GetEdifice (Verse.IntVec3 c

引用自 Astasia：

Interesting. No idea what could cause that, but checking your log for errors after the issue happens might give some clue.

A friend of mine has identified

Root level exception in OnGUI(): System.NullReferenceException: Object reference not set to an instance of an object
[Ref FA90F00F]
at
RimWorld.CompFacility.DrawPlaceMouseAttachmentsToPotentialThingsToLinkTo (System.Single curX, System.Single& curY, Verse.ThingDef myDef, Verse.IntVec3 myPos, Verse.Rot4 myRot, Verse.Map map) [0x000bb] in <630e2863bc9a4a3493f2eff01e3a9556>:0
at

...
Exception registering RimWorld.Mechlink RimWorld.Mechlink in loaded object directory with unique load ID [excepted]: System.NullReferenceException: Object reference not set to an instance of an object
at
(System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()

Tried to spawn RimWorld.Mechlink out

reference not set to an instance of an object
at FactionColonies.FactionFC+MercenaryDied.Prefix (Verse.Pawn __instance) [0x0000c] in <453528dea38b4e37806851e688ccb3e8>:0
at (wrapper dynamic-method
Exception filling window for RimWorld.Page_ConfigureStartingPawns: EdB.PrepareCarefully.InitializationException: Prepare Carefully failed to initialize ---> System.NullReferenceException: Object

_8484423) A = Thing_DMS_MechGestatorSamll404240 Giver = ThinkNode_QueuedJob [workGiverDef: DMS_DoBillsMechConstructor])
System.NullReferenceException: Object reference not set to an instance of an object
Verse.GenRecipe+<FinalizeGestatedPawns>d__1.MoveNext () [0x00028] in <630e2863bc9a4a3493f2eff01e3a9556>:0
at <0x19497377e20 + 0x002c9> <unknown method>
at System.Linq.Enumerable.ToList[TSource] (System.Collections.Generic.IEnumerable`1

unable to determine what is causing it

This is what the dev log says:

Root level exception in Update(): System.NullReferenceException: Object reference not set to an instance of an object
at
but im not sure if i have to willpower to do it.

I suspect a mod update did this but i am not able to determine if its true since most of my recently updated mods are not used in this save, and those

Exception in RimWorld.FloatMenuMakerMap.ChoicesAtFor: System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.GeneUtility.MetabolismAfterImplanting
(Verse.Pawn pawn, RimWorld.GeneSet geneSet) [0x00054] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Xenogerm+<GetFloatMenuOptions>d__14.MoveNext () [0x000eb] in <cd7169108ea74757aa50c5b33d275c15>:0