After running the AutoCALC process on a long grid system, you realize some of the gridlines in the middle didn't get picked up.

Command Failure for External Command... System.NullReferenceException

AutoCALC is creating extra node points where there shouldn't be.  In the image below, node 45 shouldn't be created as there's neither a flowing head nor a change in diameter at that point.

'extra node'

'extra ref point'

'extra reference point'

'refpt'

Call from 'AutoList::CleanupDatabase (hangerHeaderDB)' DAO Error The changes you requested to the table were not successful.... DAO error

Error is V50 Drops

"AutoLIST Failed!... Please run Listing CheckUps"

This message is shown when running the AutoLIST process, but checkups didn't find any errors AutoLIST Failed

When running an AutoLIST, you get the error;

AutoCAD Error Aborting

INTERNAL ERROR: eNotOpenForWrite message

Runtime Error 5 when opening HydraLIST during the AutoLIST process. Error 5

When starting the listing process, you get this error

File Location Error

Please browse to set stocklist location.  It must be a valid path.  Then try again

When running an autolist, you're no longer getting the listing tag IDs such as MAIN A.1, MAIN A.2, MAIN A.3, etc show up on your drawing.  It only shows the original tag of MAIN A 

Same can be said for line tags #LN1.1, #LN1.2, etc