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 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

Runtime error 70 permission denied

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

Sprinkler not properly configured.  Please re-select using 'Choose part'

Step 1a.6 - Hangs at attaching heads

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...

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

When raising to 3D, you get the following error;

Error inserting to block table HEAD#/HH## to head dictionary

When connecting a hard pipe armover to a flexible sprinkler connection (FSC), the flex hose doesn't continue straight, instead it immediately turns 90° before curving back and down to the sprinkler head.

Even with setting the connection to OVER-DOWN

Spacing and Layout... Unhandled Exception... Method not found: HeadSelectorForm

Unhandled Exception... System.ArgumentOutOfRangeException: Index was out of range

No error reported for FSC even when maximum length is clearly exceeded

If you view the FSC properties, it's possible the HoseLength and MaxNumberOfBends values are not set.

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)

When trying to insert a sprinkler head, this window pops up;

Pick head insertion point. Pick any point besides endpoint to break into pipe. Can't find file in search path

*Invalid*