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'

Error placing Reference Points or Demand Area annotation... The 3D view ownerDBViewId is not locked.

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

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?

Untitled.hlf is somehow protected and will not delete. Runtime Error 70, 70

Some application unistalled or delete miscrosfot jet files form the computer. Most if not all of the files listed below are missing from either the windows/system32 folder or the program file/common/miscrosoft shared/dao folder DAO350.dll ExpSrv.dll MSJet35.dll MSJInt35.dll MSJtEr35.dll MSRepl35.dll MSRD2x35.dll MSVCRT40.dll VB5DB.dll VBAJet32.dll Runtime error 3633, 3633

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

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

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)

When hitting Save, Refresh Drawing or Calculate Results, user gets a Run-time 9 error. AKA Subscript out of Range

Double-clicking your HydraCALC icon makes nothing happen.  You do not see HydraCALC open onscreen nor on your taskbar.  

If you open your task manager and see the app "Hyd_prog.exe" open but not on your taskbar, then the application is stuck in purgatory.

If you see entries here, use END TASK to get rid of them.  Scroll into BACKGROUND PROCESSES as well as they may not show up in "Apps"

Another possibility may be that it's on the taskbar but not on your screen.  That means it's open but offscreen. 

See this HydraCARD to fix that issue;  HydraCARD 565 only AFTER you've checked on the solution below.

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

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