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 trying to add reference points, none are added and this error shows:

Revit could not complete the external command... Object Reference not set to an instance of an object.

When printing final, your outside hose demand after the pump isn't included in the total flow.

In the example above, the system demand is 1274 gpm is represented by point D2/D3.  The outside hose adds up to another 250 gpm but there isn't another marker at 1524 gpm

*Please note, while the Demand summary at the top shows D3 as a point, since D2 and D3 are the same value, the graph will only show point D2.

When opening HydraCAD, you get this error

Unhandled Exception...DAO32Server...

HydraLIST ribbon is missing in the Revit toolbar when opening a project file.

When opening Hydracad you get the following error:

Unhandled exception has occurred in a component in your

application. If you click Continue, the application will ignore this error

and attempt to continue.

Retrieving the COM class factory for component with CLSID

{44D62FAE-67A7-4131-BF38-489CDFE44738} failed due to the

following error: 80070005 Access is denied. (Exception from

HRESULT: 0x80070005 (E_ACCESSDENIED)).

When opening Hydracad you get the following error:

Unhandled exception has occurred in a component in your

application. If you click Continue, the application will ignore

this error and attempt to continue.

Retrieving the COM class factory for component with

CLSID {44D62FAE-67A7-4131-BF38-489CDFE44738}

failed due to the following error: 80070424 The specified

service does not exist as an installed service. (Exception

from HRESULT: 0x80070424).

Bad update. These Files are missing system folder dependencies of HydexVB64 or HydexVB3: MFC100u.dll MSVCR100.dll MSVCP100.dll Because of this, no pass can be given nor does security work on any product. (64-bit products may work while 32-bit products don't or vice versa) Opening

When trying to add reference points, none are added and this error shows:

When trying to insert a Hydraulic demand block (Compact/Standard/Expanded) (IHD command) and after selecting the .WXF file to use;

You get the error message;

Error: bad argument type: numberp: DATAFILE

And the command kicks you out.

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.