Opening a drawing is taking a long time.  The process is very slow.

When trying to redefine and insert a sprinkler head, you get this message in the command prompt;

Command:
H_SETSPR
Pick head insertion point. Pick any point besides endpoint to break into pipe (try NEArest osnap or TRACKING)
Command:
H_SETSPR
Error: bad argument value: non-negative: -1

When trying to insert a sprinkler head schedule, after selecting the heads and attempting to select a point to insert the text, you get the following error;

Command:
Select Heads to put in schedule (as in by floor) or Right-Click to add all heads to schedule
Select objects: Specify opposite corner: 8 found
Select objects:
Please pick start point for schedule
Error: bad argument value: non-negative: -1
 

Server Replied:
No matching serial number was found in the database

Server Replied:

BAD;32503680000

Server Replied:

“An error has occurred and the activation could not be completed. Please contact customer support for further information.” 

When using Rapid Main or Rapid Line, clicking on the pipe causes a Fatal Error

While trying to process a job, the error below pops up;

Microsoft Visual C++ Runtime Library|Runtime Error|SldReports.exe|abnormal program termination

and

Processing reports|Processing pipe sketches

When trying to raise to 3D, the following error message pops up;

Autodesk.AutoCAD.Runtime.Exception: eKeyNotFound

and

Exception Occured at AddURLToHyperlinks::HydraHeads

The drawing will continue to raise up to 3D, but there will be no 3D sprinkler heads shown

When attempting to define a sprinkler head, after selecting NEW SYMBOL and choosing a sprinkler head, when your click OK to set its definitions, nothing happens and you go back to a command prompt.  The defininition window does not appear at all.  If you notice grey colored text,this is also a cue there is something wrong

When trying to raise to 3D, show model, show system model, you get the error;

Access denied to HydraPipe Utilities

and

System.NullReferenceException: Object reference not set to an instance of an object at HCADexports.RevitConversion.create_hydrapipes_from_db()

Upon calculating a file, the error message, "Failed to launch C:\HES\Hydratec for revit\programs\calcdiagnose.exe" pops up.

Was preceeded by these messages;

Plus this;  Number of Loops -1 and or Nodes with undesignated elevations

No Pipe Types are displayed in the Pipes ...  Pipe Types...  drop down list

                       -or-

Pipe Types known to be selected are not included in the  Pipe...  Pipe Types...  drop down list

When trying to create a new Info Sheet, you're greeted with the error; 

Error during load of .INF data, mismatched file versus form

Unable to Load HCADWIN.MNL

ARX does not load. HydraCAD functions do not work

AutoCAD Options Files tab contains greyed out entries. No entries in the Files tab can be edited, added or deleted

When viewing the final calc printout, the info sheet shows the line,

text1(35) - invisible

This error appears immediately when trying to run Create Stocklist, the dialog box never appears. 

Revit could not complete the external command... System.NullReferenceException

Install or Update appears to hang.

When opening Valve Selector received the following message: Initialization Failed
Application failed to initialize.

This error may start out as "Could not load default information for the Pipe Model settings"

But will then turn into an AutoCAD fatal error.

When selecting the Navis Toolkit then the SETUP button, you get the error;

AutoCAD Error Aborting

Fatal Error: Unhandled Access Violation 

None

Command Line in AutoCAD is missing