Help with CompProperties_Art

[ilikegoodfood]

I have created a new animal for my Monster Mash mod that, upon butchering, provides its shell as a statue.

Copying over the various required parts from the core statues and other buildings, I created what I hoped would be a working piece of art, and it sort of is.
The problem is that I need it to enjoyable as art, using the following code, but it shouldn't have a random name and description.

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<comps>
<li Class="CompProperties_Art">
<canBeEnjoyedAsArt>true</canBeEnjoyedAsArt>
</li>
</comps>

Using this code creates several errors.

These include the following:
Upon first selecting the minified shell:

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Inspect string for MinifiedSculpture14104 contains empty lines.

And upon trying to butcher the creature:

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JobDriver threw exception in initAction. Pawn=Blue, Job=DoBill (Job_241) A=Thing_TableButcher14118 B=Thing_CarrionCrawler_Corpse14117 C=(75, 0, 73), Exception: System.NullReferenceException: Object reference not set to an instance of an object

Now, I think this is because the CompProperties_Art requires a nameMaker and descriptionMaker, which I don't want, but even when I do add them, it not only fails to generate them, but produces other errors. Furthermore, both with a without the name and description makers, the inspect tab for art fails to show up, even though I am calling it. I think this may be because it's empty, but I'm not sure.

Please help.

Here is the complete code for the item, in case it's of use:

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<?xml version="1.0" encoding="utf-8" ?>

<Defs>

<ThingDef ParentName="BuildingBase">
<defName>MM_CarrionCrawlerShell</defName>
<label>carrion crawler shell</label>
<description>The calcium carbonate shell of a carrion crawler. The spiral pattern and earthy colors are quite beautiful.</description>
<thingClass>Building_Art</thingClass>
<graphicData>
<graphicClass>Graphic_Single</graphicClass>
<texPath>Things/Building/Art/CarrionCrawlerShell</texPath>
<drawRotated>false</drawRotated>
<allowFlip>false</allowFlip>
</graphicData>
<minifiedDef>MinifiedSculpture</minifiedDef>
<altitudeLayer>Building</altitudeLayer>
<passability>PassThroughOnly</passability>
<pathCost>70</pathCost>
<useHitPoints>true</useHitPoints>
<fillPercent>0.5</fillPercent>
<rotatable>false</rotatable>
<size>(1,1)</size>
<canOverlapZones>false</canOverlapZones>
<drawDamagedOverlay>false</drawDamagedOverlay>
<statBases>
<MaxHitPoints>200</MaxHitPoints>
<WorkToBuild>20000</WorkToBuild>
<Flammability>0</Flammability>
<Beauty>340</Beauty>
<Mass>100</Mass>
<SellPriceFactor>1.10</SellPriceFactor>
</statBases>
<comps>
<li Class="CompProperties_Art">
<canBeEnjoyedAsArt>true</canBeEnjoyedAsArt>
</li>
</comps>
<selectable>true</selectable>
<costList>
<Gold>50</Gold>
</costList>
<leaveResourcesWhenKilled>false</leaveResourcesWhenKilled>
<inspectorTabs>
  <li>ITab_Art</li>
</inspectorTabs>
<forceDebugSpawnable>true</forceDebugSpawnable>
<building>
<expandHomeArea>false</expandHomeArea>
<repairable>false</repairable>
<isInert>true</isInert>
</building>
    </ThingDef>

</Defs>

[wwWraith]

This may be related to the error.

I think the other way could be to make the shell just a material required to construct a new statue type.

[ilikegoodfood]

That does indeed seem to be related to the error. I can't deal with it today now. The error message in the screenshot seems to be the same...

[ilikegoodfood]

Well, I have discovered two things:

1) The error message I'm getting is not the same one that the mod you linked is designed to fix.

2) I still don't know why I'm getting the error. Following the trace through, it seems to be trying to place a zero on a quantity or something like that, but I'm not sure what I'm reading.

Here is the trace:

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JobDriver threw exception in initAction. Pawn=Sanchez, Job=DoBill (Job_142) A=Thing_TableButcher5011 B=Thing_CarrionCrawler_Corpse5020 C=(83, 0, 92), Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at Verse.GenRecipe.PostProcessProduct (Verse.Thing product, Verse.RecipeDef recipeDef, Verse.Pawn worker) [0x00000] in <filename unknown>:0
  at Verse.GenRecipe+<MakeRecipeProducts>c__Iterator0.MoveNext () [0x00000] in <filename unknown>:0
  at System.Collections.Generic.List`1[Verse.Thing].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0
  at System.Collections.Generic.List`1[Verse.Thing]..ctor (IEnumerable`1 collection) [0x00000] in <filename unknown>:0
  at System.Linq.Enumerable.ToList[Thing] (IEnumerable`1 source) [0x00000] in <filename unknown>:0
  at Verse.AI.Toils_Recipe+<FinishRecipeAndStartStoringProduct>c__AnonStorey2.<>m__0 () [0x00000] in <filename unknown>:0
  at Verse.AI.JobDriver.TryActuallyStartNextToil () [0x00000] in <filename unknown>:0  lastJobGiver=RimWorld.JobGiver_Work, curJob.def=DoBill, curDriver=Verse.AI.JobDriver_DoBill
Verse.Log:Error(String)
Verse.AI.Pawn_JobTracker:StartErrorRecoverJob(String)
Verse.AI.JobDriver:TryActuallyStartNextToil()
Verse.AI.JobDriver:ReadyForNextToil()
Verse.AI.<DoRecipeWork>c__AnonStorey1:<>m__1()
Verse.AI.JobDriver:DriverTick()
Verse.AI.Pawn_JobTracker:JobTrackerTick()
Verse.Pawn:Tick_Patch1(Object)
Verse.TickList:Tick()
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()

[ilikegoodfood]

Success, sort of.

I have discovered that, in order to make a successful art item that uses the Building_Art thingClass and the CompProperties_Art, it must have the following four things:

• CompQuality
• nameMaker
• descriptionMaker
• canBeEnjoyedAsArt

Now then, this leaves me with two options, one of which is easy, the other is hard. I can either:

• Change the item from an art item to a beauty item, which removes the art tags and releases it as a high-beauty piece of furniture.
• Create a nameMaker, descriptionMAker and set the CompQuality to use cooking (butchering) instead of art.

The first option would let me get the creature out tonight, or tomorrow.
The second would take a while, since the makerDefs are a little more complex and I don't honestly want to get into them for an item that shouldn't have a name or description anyway.

I've decided to go with the first option.