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 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

After creating a legend for your 3D riser, you use the ILT command to insert a legend tag.  It inserts the tag, but you get the error.  You have to click CONTINUE then repeat the command to place another one.

Unhandled exception has occurred in a component in your application

Arithmetic operation resulted in an overflow

Application does not support just-in-time (JIT)

In HydraKEY, the "Authorization Number" is displaying a number that is not yours or you are receiving software that is not yours, and failing to Renew your own Authorization Number, or get your own software.  In the HAM log, visible only to Hydratec Employees, the Authorization number is being used on machines at different companies.

When starting the Autolist process, you get the error;

AutoList Error 101:  Could not read fitting group name.  Fix your Fitting Mapping in the HydraLIST toolbar

After clicking OK, you get this next

AutoLIST Error!!  AutoLIST failed!...  Please run Listing Checkups