When opening HydraVIEW as stand-alone, via HydraCALC or via HydraLIST, nothing happens.

1. Its icon is NOT in the taskbar

2. HydraVIEW is running in the Windows Task Manager;

"Viewer compatible with Win 2000 & HydraLIST and HydraCALC - Contains Print Previewer (32 bit)"

After adding a Secondary Curve to your water supply, you decide you don't want it, it's impossible to remove the secondary curve value.

Revit could not complete the external commad... Method not found

When right-clicking the Fittings column, you get a MiscFunc Run-time error 5, Invalid procedure or argument

When starting AutoCALC, it stops in the v50 Fuel Gauge at step 1a.4 - Calculating Total Lengths. 

Working on the pipe from node xxx to node xxx with a fitting string...

May be followed by a Runtime Error 13 as well

When attempting to Launch HydraLIST to start building your riser, you get this error;

When trying to insert a 3D fitting via the Fittings Parts Tree, the user gets the error message;

Microsoft .NET Framework
Unhandled Exception has occurred...
Argument 'Key' is not a valid value

When user clicks CONTINUE and tries to use the INSERT button to insert a fitting, another dialog box pops up

INSERT FITTINGS
Unhandled Exception...
Index was out of range.  Must be non-negative and less than the size of the collection.  Parameter name: index

Unknown *invalid_ skipole* 3D Risers HydraCAD v50

After setting up a fitting in the Parts Tree then trying to Insert Fitting, you get the Unhandled Exception error below

eLockViolation