3D Details (3D Fittings) missing, only the skipoles are showing

Blacked out cells in Head Selector dialog

Unhandled Exception has occurred in a component in your application.

One of the identified items was in an invalid format

 No inch marks (“) after the pipe diameter or there are but you prefer to remove them

Reviewing the results you notice a discrepancy between the k-factor of an equivalent k versus a sprinkler head using that equivalent k-factor

In the example below, EQ02 has a k-factor of 5.37.  Reference point 1 is supposed to use the k-factor of EQ02 (5.37) but in fact is using a different value (5.36).

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

There is also Runtime error 5 invalid procedure call or argument 

Server Subscription Error when getting available subscriptions.

Inserting a pipe dimension (pipex) places it at the end of the pipe, including its center grip or not even on the pipe at all

See solution #3 if the PIPEX is not on the pipe

After opening AutoCAD and a drawing, you have a dead area where you can't draw nor does anything display.  Usually next to a compressed palette.  Note in the image below how the crosshairs do not extend to this area.

When starting the Pretty Pipes command, you get an Unhandled Exception error including 'Could not find a part of the path'

Another error may mention blockoffsets.dat