1. Inserting a hydraulic reference point doesn't erase an existing ref point at the same location

2. New ref points in HydraCALC are not using the values of the HYD ref points.

AutoCALC is creating extra node points where there shouldn't be.  In the image below, node 45 shouldn't be created as there's neither a flowing head nor a change in diameter at that point.

'extra node'

'extra ref point'

'extra reference point'

'refpt'

Step 1a.1 - Error box - missing Pipe Type pointing to Ref 1 & Ref 2

can also be Step 1a.4

Dummy reference points cannot find the dummy ref point block in the drawing's block table. **Possible there's a missing registry entry** Dialog box 52.04

Step 1a.10 - "Attaching Node 2 Elevations" User ID Duplicated Dwg ID Dup for User ID

Duplicated hydraulic ref points

Bad ref point block Dialog box

Revit could not complete the external command... Curve length is too small for Revit's tolerance

Hangers dialog won't open:

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

One or more toolbars cannot be found after selecting a menu or command.

This happens because the toolbar is being opened 'off screen'. This usually happens when the computer has a dual monitor but the 2nd monitor isn't currently connected. 

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.

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

Run-time Error 339

"Component tab32x30.OCX, spr32x25.OCX, spr32x35.OCX (or a different .OCX file) or one of its dependencies not correctly registered"  "A file is missing or invalid"

Subscription cannot be activated at this time.

During the install of HydraCAD, you get an error, "Setup Needs the Next Disk, Please insert disk 1 that contains the file data2cab"

 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 

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.