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

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

Drawing looks strange, piping looks hollow and sprinkler heads a little off and Acad background looks greyish/grayish.

Drawing also seems to lag when panning, processes take longer

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)

HydraCAD locks up when trying define a new sprinkler head.  You have to CTRL+ALT+DEL to shut down Acad.

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

When starting the AutoCALC process, you get this error;

Could not find fitting match for Pump Only/Test Point Please check!!

You also see an Accessing Database window with a partial green progress bar.

No Operating Heads of Flows Found!!  Please check...

No Operating Heads or Flows found!! Please check...