Printing a calc shows this error in HydraVIEW;

File not found Runtime Error 53

While in your viewport, your riser is visible while in the 2D Wireframe view.  However if you change the Visual Style to Conceptual or Shades of Grey/Shades of Gray, your 3D riser disappears.  You may notice if re-appears if you zoom out.

 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).

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

Pop-up immediately after selecting RTS Points

The location that your document is saved in cannot be used. Please select that folder that you would like RTS data saved to,

Command Failure for External Command... Object reference not set to an instance of an object

Error placing Reference Points or Demand Area annotation.: System NullReferenceException: Object reference not set to an instance of an object. nodes reference finish

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

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

After buiding your 3D risers, raising to 3D, exporting to a Persistent Model and Navisworks successfully, your 3D riser is missing, with the exception of the skipoles

Your layers are on and the 3D_DETAIL layer is present, unlocked, thawed and visible, you just can't see the pipe and fittings.  The one customer reporting this said they disappear if the drawing is closed then re-opened.  They'll be visible in viewports as well, just not in 2D view.

See this related HydraCARD also;  https://hydracards.hydratecinc.com/cards/card-1144

Step 1a.1 - Error Box - User ID Duplicated

Transfer to HydraCalc - Step I1a.10 System is now 'Attaching Node 2 Elevations error occurs, please report both the step number and the step description to support! Error Display Error Type User ID Duplicated Step Ref 1 Ref 2 Ref 3 I Ref 4 1a.1

When attempting to create a new FSC definition, you get this error message.  Clicking OK closes the command

Revit could not complete the external command... Object Reference not set to an instance of an object.

Cannot get latest Hydrakey update information.

When trying to open the dialogue box to define a Flexible Sprinkler connection, the following message box error appears. 

Could not find file; FSC-INSERTDEFLINE.txt

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?

bazillions of Scale Lists in the drawing (most likely due to xrefs) Copy Paste