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

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...

Run-time error 3051... The Microsoft Jet database engine cannot open the file

Can happen when opening HydraLIST or Head Selector

50.00.14+

Blacked out cells in Head Selector dialog

Reviewing the results you notice a discrepancy between the k-factor of an equivalent k versus a sprinkler head using that equivalent k-factor

In the example below, EQ02 has a k-factor of 5.37.  Reference point 1 is supposed to use the k-factor of EQ02 (5.37) but in fact is using a different value (5.36).

When trying to insert a Sprinkler Head Schedule (SHS command), after viewing the setup dialog box, then selecting sprinkler heads, when asked to select a location for the guide, you get the error;

Please pick start point for schedule

Error: bad argument value: non-negative: -1

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

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