When starting the AutoCALC process, you get an error like this;

You are missing a --- refPoint to complete a JUMP. 

Clicking OK should allow the process to continue on

When starting the AutoCALC process, you get the error; Unhandled exception has occurred in a componenet in your application

eOnLockedLayer

x Zero length pipes found in system model YES will cancel... No will allow...

When starting the AutoCALC process, you get the error Unhandled exception has occurred in a component of your application

Key cannot be null

Parameter name: key.

Expanding DETAILS shows this information;

Application does not support just-in-time (JIT)
debugging. See the end of this message for details.

************** Exception Text **************
System.ArgumentNullException: Key cannot be null.
Parameter name: key
   at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
   at HCAD_HUI_CALC.CalcClass_Utilities.GetNodesOfPipesThatAreVertical(String FitID, Calc_File myCalcFile)
   at CalcingNameSpace.AutoCalcForm.MakeCalcFiledataPart1(Database db, Calc_File& MyCalcFile)
   at CalcingNameSpace.AutoCalcForm.SetupCalcFile()

When starting the AutoCALC process, you get this error;

Could not find fitting match for Pump Only/Test Point Please check!!

Running an AutoCALC, it hangs at step 1a.3 while attaching fittings and you get a Runtime Error 5