Dup Equiv K / Sys Pipe Node

Upon starting the Show 3D command (S3D) the drawing immediately switches to SE isometric, reports no errors but no 3D piping is visible.  Even newly drawn pipe won't elevate.

Drawing successfully elevated to 3D. No errors were found

Related HydraCARD: #853

https://hydracards.hydratecinc.com/cards/card-853

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

Drawing zooms out to expected isometric view as if 3D System Model has been completed. No 3D Pipe can be found. Unknown cause No 3D Pipe Seen All

The Show System Model process shows all pipes and fittings including riser nipples. However, Riser Nipples do not display in Realistic or Conceptual Visual Styles. HydraCAD V50

Step 1a.1 - You may be missing a selected pipe type from master.dat or no pipe type has been selected for a particular system component

incorrect setting for the autocad system variable ATTREQ

When attempting to create a 3D model, you get the error; Please switch to System Model to Annotate Drops and Sprigs plus

System.NullReferenceException: Object reference not set to an instance of an object

at HCADexports.RevitConversion.create_hydrapipes_from_db()

at HCADexports.RevitConversion.create_hydrafittings_from_db(List'1 pipes, List'1 heads)

Upon calculating a file, the error message, "Failed to launch C:\HES\Hydratec for revit\programs\calcdiagnose.exe" pops up.

Was preceeded by these messages;

Plus this;  Number of Loops -1 and or Nodes with undesignated elevations

Revit could not complete the external command... System.NullReferenceException

Hydrapipe - vertical pipe issue Switching to Edit Mode leaves HydraPipes in Hydrapipe layer. Then when trying to show system model you get an AutoCAD message box "Please Switch to Edit Mode. Then try again." Switch to Edit....

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

After starting the Move Main command (MMA), and selecting the main to move, the system freezes and the only way to get out is to end task in the Task Manager

In HydraCALC Sizer, when trying to estimate a looped sprinkler system, the function doesn't work. It shows the loop only on the right side and it will not adjust when clicking the arrow buttons to move the main piping. n/a 50.3.50

Riser Nipple cut dimension changed to the wrong value after going into the 3D System Model. The Riser Nipple show the wrong takeout value for the sp TakeOut & ep TakeOut properties. This was caused by the SHOW FITTINGS command. HydraCAD v5x.any

Hangers dialog won't open:

Unhandled exception has occurred... Object reference not set to an instance of an object

No Ribbons / only the HydraCAD Ribbon appears, and no commands work.
Revit could not complete the external command. Could not load file or assembly. The system cannot find the specified file. 

Unhandled Exception has occurred in a component in your application.

One of the identified items was in an invalid format

System.IO.DirectoryNotFoundException: Could not find a part of the path