No error, but after returning to Revit, no demand info block turns up. 

Error placing reference points or demand area annotation...... System.IndexOutOfRangeException: Index was outside the bounds of the array "Make Pipe Type Info Array String"

1. The info sheet has symbols when it is expecting a number or blank, i.e. "Rack Sprinkler Demand" is N/A instead of blank or 0. Error:Bad Argument 52.02+

When re-opening a calc file generated by Hcad for Revit, you get a Runtime-error 62, Input past end of file

Followed by an 'error during load_data' message.

NOTE:  After clicking OK, the job will open to blank data.  Close the file.

DO NOT CLICK 'YES' TO SAVE YOUR DATA otherwise you will lose all your data and there is no way to recover it.

When starting the AutoLIST process, the message box shown below pops up.  The process "pretends" to continue through, but when HydraLIST opens, it's completely blank.

Re-run Autolist with the drawing starting on the ground. Current run will not include any FSC information in the MISC tab in HydraList.

When viewing the final calc printout, the info sheet shows the line,

text1(35) - invisible

When trying to run the calculation, you get the message, 

"The system flow demand of ### exceeds the maximum rated flow as indicated in the Pump Curve for the pump with the inlet of PI and outlet of PO.  The calculation will not continue"

But your flow is a very large number

System seems to hang at this step, but eventually shows the error;

Hydraulic Calculation - The system flow demand of ####.## exceeds the maximum rated flow as indicated in the Pump Curve for the pump with the inlet of PI and outlet of PO.

The calculation will not continue Calculation failed for an unknown reason

May not be 1a.3 or 2.3, could be anywhere along here.

When running the "FSC Setup" to "Create FSC Definition". 
Upon finishing the block definition, the block definition is missing a crucial property for "Hydraulic equivalent length is referenced by:". This field will show blank or the default generic text and did not include the HydraCALC pipe/fitting reference information.

There is a missing HydraCALC "ImportExport" directory.

Default line text:
`Hydraulic equivalent length is referenced by: shortname with length number - longname Listing: FM`

System.NullReferenceException: Object reference not set to an instance of an object.

Server Replied:
No matching serial number was found in the database

Server Replied:

BAD;32503680000

Server Replied:

“An error has occurred and the activation could not be completed. Please contact customer support for further information.” 

Upon calculating a file, the error message, "Failed to launch C:\HES\Hydratec for revit\programs\calcdiagnose.exe" pops up.

Was preceeded by these messages;

Plus this;  Number of Loops -1 and or Nodes with undesignated elevations

Error placing Reference Points or Demand Area annotation... The 3D view ownerDBViewId is not locked.

When trying to install HydraCAD, you get an error;

HydraCAD Version 58 must be installed on this computer before running this update.  Please download and install the full install of v58.

When trying to create a new Info Sheet, you're greeted with the error; 

Error during load of .INF data, mismatched file versus form

Unhandled Exception has occurred in a component in your application.

One of the identified items was in an invalid format

When opening HydraCAD, you get this error

Unhandled Exception...DAO32Server...

Error placing Reference Points or Demand Area annotation.: System NullReferenceException: Object reference not set to an instance of an object. nodes reference finish

System flow demand exceeds the maximum rated flow...

Revit could not complete the external command... System.ArgumentException