When attempting to convert an existing polyline to the Remote Area polyline, you get the following error when selecting a pline. Error: Automation Error. Key not found Command:

When trying to insert a newly defined Flexible Sprinkler Connection, an unhandled exception dialog box appears.

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

Some pipe sizes have the diameter and length attributes switched in their order

Error No Tags Found No Tags Found

Unhandled exception: eNullobjectId Application does not support just-in-time (JIT)

Trying run a calculation as stand-alone, or via AutoCAD/AutoCALC or Revit/AutoCALC, you get this error message;

Run-time error 339:  Runtime error 339  Runtime 339
Component 'MSCOMCTL.OCX' or one of its dependencies not correctly registered: a file is missing or invalid

It's likely a job without a pump works, but one with a pump crashes
 

Command Failure for External Command... Revit could not complete the external command.

Error Getting Available Subscriptions during refresh or while repopulating the HydraKEY dialogue.

When trying to transfer an Entitlement using the Hydratec Entitlement Transfer Utility ("C:\HES\Common\Entitlement Transfer\HydraEntitlementTransfer.exe") , after plugging in the USB to the "new" computer, you can't see a license to transfer.

The recipient does not show up the the window for licenses available to move (top right), but are visible in the bottom right window.