Upon starting the Checkup command for AutoCalc, the command starts but stops. The Command Prompt says; "Initializing... Checking to make sure heads are in the right layer...bad argument type: stringp nil" As a side note, the user's drawing had multiple repeat head definition boxes (blue boxes in ACC1 layer). These were cleaned up (deleted) and the heads redefined. The AUDIT command was run after the cleanup

Keyboard alias "BS"

Bayspace preview is not lining up the sprinklers evenly.  Or Bayspace stops working with a "Bad Argument Type 2D/3D point error." message.

Calc loading bar stops completely at step 1a.9

When trying to open HydraCAD after a recent install, you get this error or one similar to it;

"Missing shortcut", Windows is searching for acad.exe.  To locate the file yourself, click Browse.

AND

Problem with Shortcut - The item 'acad.exe' that this shortcut refers to has been changed or moved, so this shortcut will no longer work properly.

Nearest match based on size, date, and type:

Do you want to fix this shortcut to point to this target or do you just want to delete it?

Calculation stops at Step 1a.4 - calcing total lengths

There is also Runtime error 5 invalid procedure call or argument 

Failure at Step 5a.3b

The "SECTIONPLANE" command caused various pieces of the 3D Details to disappear. You may be able to delete the SECTION PLANE and have the missing items reappear. n/a n/a Hcad v52+

New nodes will be inserted with an elevation of 0. The existing node has an existing elevation other than zero, therefore the attributes don't match and it won't delete the previous node. HYD Layer HydraCAD

Unable to Load HCADWIN.MNL

ARX does not load. HydraCAD functions do not work

AutoCAD Options Files tab contains greyed out entries. No entries in the Files tab can be edited, added or deleted

Possible duplicate Device @ (0,0,0)

There are 3d solids in the drawing that have no geometry. They must be deleted but cannot be selected with a window. Issue can be caused when a 3D Detail fails to be created properly - process creates a footprint at 0,0,0 with no geometry to be seen. Persistent Model

TWO SYMPTOMS:

Drawing fittings and pipe look disjointed, like that time an alien team of scientists were performing out-of-phase medical experiments on the Voyager crew.

Or, on the way into Revit, you get this error;

Error (must be addressed in order to continue)

Revit has experienced an unexpected error.  The operation has been cancelled to protect your project from corruption

Deleted element

When reporting the error, you may see this;

Hashtable head_table, Hashtable FLXpipeTable, List '1 listFtgs, flexpipes PipeTypeInfo ptInfo

Process could not delete database file. Close HydraLIST project and Retry Retry Cancel n/a

when picking New Take Off Sheet

The CURRENT LAYER in the drawing is LOCKED. Show System Model process stops on Step 13 of 28 while adding RN Fittings to the drawing. Picking the 2D Switch to Edit Mode button removes the Hydrapipes and the riser nipples. Show System Model HydraCAD V51

No Error given but Pipes look like theyy are missing after program completion.

Running AutoCALC checkups on a drawing causes AutoCAD to crash out AutoCAD Application has stopped working A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available.

Just after starting the Autocalc Settings, the dialog box as shown below pops up and the process stops.  

Something went wrong!  Error Code J19380

When starting AutoCALC, it stops in the v50 Fuel Gauge at step 1a.4 - Calculating Total Lengths. 

Working on the pipe from node xxx to node xxx with a fitting string...

May be followed by a Runtime Error 13 as well

When running AutoCALC, the process stops around step 2.4c and you get a Run-time error 457, "This key is already associated with an element of this collection

No error, but when opening the file menu and opening Revit, the program freezes or stutters anywhere between 10 seconds - 1 minute.