Dynamo Error

Just got this error on a graph that was working (unless I made a change and forgot?). Help?

Exception of type 'ProtoCore.Exceptions.CompilerInternalException' was thrown.

   at ProtoFFI.CLRObjectMarshaler.UnMarshal(StackValue dsObject, Context context, Interpreter dsi, Type expectedCLRType)
   at ProtoFFI.ArrayMarshaler.ToICollection(StackValue dsObject, Context context, Interpreter dsi, Type arrayType)
   at ProtoFFI.ArrayMarshaler.UnMarshal(StackValue dsObject, Context context, Interpreter dsi, Type expectedCLRType)
   at ProtoFFI.CLRObjectMarshaler.UnMarshal(StackValue dsObject, Context context, Interpreter dsi, Type expectedCLRType)
   at ProtoFFI.ArrayMarshaler.ToICollection(StackValue dsObject, Context context, Interpreter dsi, Type arrayType)
   at ProtoFFI.ArrayMarshaler.UnMarshal(StackValue dsObject, Context context, Interpreter dsi, Type expectedCLRType)
   at ProtoFFI.CLRObjectMarshaler.UnMarshal(StackValue dsObject, Context context, Interpreter dsi, Type expectedCLRType)
   at ProtoFFI.CLRFFIFunctionPointer.Execute(Context c, Interpreter dsi)
   at ProtoCore.Lang.FFIFunctionEndPoint.Execute(Context c, List`1 formalParameters, StackFrame stackFrame, RuntimeCore runtimeCore)
   at ProtoCore.CallSite.ExecWithZeroRI(List`1 functionEndPoint, Context c, List`1 formalParameters, StackFrame stackFrame, RuntimeCore runtimeCore, SingleRunTraceData previousTraceData, SingleRunTraceData newTraceData)
   at ProtoCore.CallSite.Execute(List`1 functionEndPoint, Context c, List`1 formalParameters, List`1 replicationInstructions, StackFrame stackFrame, RuntimeCore runtimeCore)
   at ProtoCore.CallSite.DispatchNew(Context context, List`1 arguments, List`1 partialReplicationGuides, DominantListStructure domintListStructure, StackFrame stackFrame, RuntimeCore runtimeCore)
   at ProtoCore.DSASM.Executive.Callr(Int32 blockDeclId, Int32 functionIndex, Int32 classIndex, Boolean& explicitCall, Boolean isDynamicCall, Boolean hasDebugInfo)
   at ProtoCore.DSASM.Executive.CALLR_Handler(Instruction instruction)
   at ProtoCore.DSASM.Executive.Execute(Int32 exeblock, Int32 entry, Language language)
   at ProtoCore.DSASM.Executive.Execute(Int32 exeblock, Int32 entry, List`1 breakpoints, Language language)
   at ProtoCore.DSASM.Executive.BounceUsingExecutive(Executive executive, Int32 exeblock, Int32 entry, StackFrame stackFrame, Int32 locals, Boolean fepRun, Executive exec, List`1 breakpoints)
   at ProtoScript.Runners.ProtoScriptRunner.ExecuteLive(Core core, RuntimeCore runtimeCore)
   at ProtoScript.Runners.LiveRunner.Execute(Boolean isCodeCompiled)
   at ProtoScript.Runners.LiveRunner.CompileAndExecute(List`1 astList)
   at ProtoScript.Runners.LiveRunner.CompileAndExecuteForDeltaExecution(List`1 astList)
   at ProtoScript.Runners.LiveRunner.SynchronizeInternal(GraphSyncData syncData)
   at ProtoScript.Runners.LiveRunner.UpdateGraph(GraphSyncData syncData)
   at Dynamo.Scheduler.UpdateGraphAsyncTask.HandleTaskExecutionCore()
   at Dynamo.Scheduler.AsyncTask.Execute()

And the DYN file.
Manage_ BIM Checker.dyn (388.7 KB)

NM - Something wrong with some Python buried in a custom node. Working now.

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