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

Have AutoCAD select a group of pipe dimension blocks with a specific diameter or length. 

In this example I want to find and delete all diameters with a ?" as its value.

After attempting to download the Latest Toolbox, a warning appears saying the file cannot be opened. 
Tells user to delete toolbox .rvt file and try again, but that does not work. 

Runtime Error 3167. Error message: Record has been deleted

Using the Sprinkler Spacing and Layout tool: Revit encountered a Autodesk.Revit.Exceptions.InvalidObjectException: The referenced object is not valid, possibly because it has been deleted from the database, or it's creation was undone.

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

Can be accompanied with a "Runtime error 5 - invalid procedure call or argument" or "Runtime error 6 - overflow"

Run-time error 9: Subscript out of range 

Area 21 of 30

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?

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

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

May be followed by a Runtime Error 13 or Runtime Error 5

Your first step of troubleshooting should be to track down the coordinates of the handles (the 4 to 6 character hex code noted after the word node, or pipe, or fitting.  Search for the command FINDME to get these coordinates.

When starting AutoCALC the v50 Fuel Gauge stops at step 1a.4 plus you get a Run-time error 6; Overflow 

Working on pipe from Node ### to Node ### with a fitting of "?" and a diameter of / pipe type of 0.5 / SCHED-40 where the pipe id = ### 

The "####" values represent handles.  It is recommended you use the FINDME tool to find the coordinates of the handles, this will help narrow down the cause of the error.

May also see a Runtime Error 5, "invalid procedure"

Calc process stops at step 1a.4 and Runtime Error 5 displays

When trying to open Add Device, nothing happens and Revit just hangs up / appears frozen.

No error, but after clicking Setup, Revit freezes / stops working, and nothing else is able to be selected.

Unable to select a pipe or fitting when trying to use the Delete Pipe tool.

This job has gone 200 or more passes without balancing.

1)This error usually means that the user does not have full access for the folder. Or a lock file already exists and can not be delete. 2) real time virus scan blocking file. 3050

Calc stops at step 2.2a, also creates Run-time error 5

Calc stops at Step 2.3 (Can also show Run-time error 62)

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