While trying to authorize the software, the following message pops up; 

Failed to access cloud storage.  Error: Unable to load DLL HydraLIB.dll:  The specified module could not be found

Error: A Webexception with status NameResolutionFailure was thrown.

Error: A WebException with status SecureChannelFailure was thrown.

Revit could not complete the external command.     System.NullReferenceException

**Trying to calculate a job which was generated from HydraCAD**, you get this error on the first attempt to calculate;

'disconnected pipe'

Revit could not complete the external command.      System.IO.FileNotFoundException

Revit could not complete the external command.      Autodesk.Revit.Exceptions.ArgumentException

Error -5001 in HydraCAD.  When opening Hydracad, it gives the following error:

Hydracad, doesn’t function properly thereafter.

Failed to launch C:\hes\hydratec for revit\programs\calcdiagnose.exe

Entitlement Expiration. If your entitlement is within 14 days of expiration it will begin informing you once per day with the following message when you open a Hydratec Product.

If you click “Yes” it will give a more detailed description of the entitlements to which this machine has access.

TSA Expiration. If your Temporary Software Authorization is within 3 days of expiration it will begin warning you each time you open a Hydratec Product.

This XML file does not appear to have any style information

When trying to run a source calc calculation (find the maximum possible denisity) with a pump as one of the water supplies, you get the error message; 

A source calc cannot be performed if a pump is present.  Please remove the pump or uncheck 'Source Calc' to continue.

After running the AutoCALC process on a long grid system, you realize some of the gridlines in the middle didn't get picked up.

Trying to run a calculation gets a Runtime error 13, Type mismatch

Server Error.
Failure to update Long Term Authorization.

Generic Model template not found. Please select it.

Missing commands on Add in for HydraCAD when trying to generate a RevitLink conversion

Revit could not complete external command.    Autodesk.Revit.Exceptions.CorruptModelException

When running an autolist, you're no longer getting the listing tag IDs such as MAIN A.1, MAIN A.2, MAIN A.3, etc show up on your drawing.  It only shows the original tag of MAIN A 

Same can be said for line tags #LN1.1, #LN1.2, etc

Revit could not complete external command

No Error, the couplings simply display way too big!   They show as huge couplings in coarse detail and medium detail.