When Opening HydraCAD or trying to list a drawing, you recieve any Error containing the following CLSID:

44D62FAE-67A7-4131-BF38-489CDFE44738

Or any of the following HRESULT error numbers:

0x800736B1

0x80040154

0x80070002

0x80080005

0x80029C4A TYPE_E_CANTLOADLIBRARY

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

text1(35) - invisible

When selecting the PROPERTIES palette for a riser nipple, the values are blank

When opening HydraCALC, you get this error.

Startup error

An error has occured during startup. The decimal separator & digit grouping symbols are not set correctly in Control Panel! The digit grouping symbol must be a comma!

When opening HydraCalc v50, you get Run-time error '13' Type mismatch OK

The calc program will open but you cannot open any jobs or do anything in the window.

Setting certain pipe diameters with specific pipe types gives an ID of 0.

Eg. 1½" - SCHED 40 shows up as 0 rather than 1.61. n/a HydraCalc

Pop-up immediately after selecting RTS Points

The location that your document is saved in cannot be used. Please select that folder that you would like RTS data saved to,

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

The font of your vertical pipes do not match the font of your pipe dimensions

When running the Line Couplings command (LC), you get the error, "No branch lines found crossing the line(s) you picked", even though it's 100% a fact the lines are intersecting