When using the Continuous option, after I am done I get an error and all the changes are erased.

When inserting a SIDEWALL sprinkler, HydraCAD does not ask for the rotation angle of the sprinkler head, it inserts it at 0°

Ideally, it should ask for the rotation angle of the sprinkler head;

No error, but when trying to connect a sprinkler to a pipe, connect head does not let you select a sprinkler

No Error given but Pipes look like theyy are missing after program completion.

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

There are identical instances in the same place.. This will result in double counting in schedules. 

Command Failure for External Command... Revit encountered a Family symbol is not valid for this instance 

Command Failure for External Command... ....System.Exception: No routing preference set for...

While using the 'Choose Part Number' button to open HydraHEAD Selector and retrieive its description and part number, you get the errors below;

Runtime Error 713, Application-defined or object-defined error

Pipe fittings in certain views were grayed out and could not be selected, making it impossible to edit or work with them.

When setting up a new head, the dialog that displays the head symbols to be selected appears, is empty, and then drawing crashes,

When using the Figure Head Area tool, you get this error

Error during APQ insert - Microsoft VisualBasic ErrObject

Error during LoadAPQFile - eFileNotFound

Error during InsertAPQandTEXT

No connectable heads found within distance specified for the line

illustrated, or heads were already connected ...

No connectable heads message comes up, even when there are obviously heads that can be connected. Can also be error stating Please re-select line away from other lines

Raising to 3D and you get this error;

Exception Occured at AddURLToHyperlinks :: HydraHeads

System.Runtime.InteropServices.COMException (0x80040154): Retrieving the

COM class factory for component with CLSID

{44D62FAE-67A7-4131-BF38-489CDFE44738} failed due to the following error:

80040154 Class not registered (Exception from HRESULT: 0x80040154

(REGDB_E_CLASSNOTREG)).

When running a calc, you first get this error indicating a number of possibilities.

Then the Pre-calc Questions window pops up with a warning.

But you go ahead with the calculation anyway and get this result

Your System Has a Deficit

System is -nan(ind) psi over the Water Supply Curve

Runtime error 70 permission denied

After calculating system this message pops up..."The specified remote head does not have a k factor. Please fix your input" hydcalc.exe

When Retrieving MEP content an error occurs. This is caused by a bad heads in the HydraCAD for AutoCAD project. 

Command Failure for External Command

Blacked out cells in Head Selector dialog

When selecting "Retrieve Part Num/Desc <" from the sprinkler Block Definition window, you get the error;

Error: bad argument type: stringp nil