Extra line of input was entered into the VPUMP.DAT file found here; \HES\HydraCAD\Ver50\Programs\3DFTGS Unhandled Exception Insert Pump n/a

No error, pump just doesn't insert 

Revit could not complete the external command... Name contains illegal characters

Discharge and or Suction inputs were typed in and not entered via the pull down. input new pump

Pump is in water supply but no reference point PI

Command Failure for External Command... ...System.IO.DirectoryNotFoundException

Revit could not complete the external command.... Details: Name must be unique... At HCAD_Revit_Tools.CAD3.Insert_Pump.Go

Runtime Error 62: Input past end of file

After running an update to 50.54, user is getting this error when trying to add a fitting by right-clicking the fittings cell, a dialog box pops up saying,  May happen with Pipe Schedule and adding a Pump as well.

File to load paths and Dirs.(AND STRING CONVERSION)
CommandLine... yadda yadda yadda

After inserting a valve, it does not appear in the 3D view. There is blank space where the valves should be. 

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 trying to insert a valve type fitting from the parts tree, you get the error; 

Still!!! Block ### is missing.  Please insert manually.

However checking the database for the drawing file shows it exists.

All building dimensions are inserted into an different layer than the current one.

No error message but cutting in couplings breaks the pipe but does not insert the couplings block.

TOS block looks odd or has unusual insertion point or text is placed far away

Elevation Check: Bad Defline(s)

Corrupt TOS deflines detected Erase and re-insert any deflines with yellow circles at its ends then try again

FATAL ERROR Unhandled Access Violation Reading 0x0000 Exception at 3BC2E053h

When inserting a listing tag on a pipe, you get the error, "Invalid color number"

Trying to insert a fabricated pipe via HydraLIST doesn't show any outlets, ski poles, etc.

As shown in HydraLIST;

Inserted into HydraCAD;

Note, no GOL is shown.

When selecting Valve Selector in the 3D Fittings window, you get the error message;

SOURCE: System.Private.CoreLib

MESSAGE: An item with the same key has already been added. Key:

When attempting to Select Sprinkler (SS or SSP command), you get the error;

Point or option keyword required.

Specify insertion point or [Basepoint/Scale/X/Y/Z/Rotate/Explode/REpeat]:

Specify rotation angle <0>:

Then your sprinkler definition box will want to be inserted, rotated and each value set individually