When trying to open HydraCAD after a recent install, you get this error or one similar to it;

"Missing shortcut", Windows is searching for acad.exe.  To locate the file yourself, click Browse.

AND

Problem with Shortcut - The item 'acad.exe' that this shortcut refers to has been changed or moved, so this shortcut will no longer work properly.

Nearest match based on size, date, and type:

Do you want to fix this shortcut to point to this target or do you just want to delete it?

When trying to Import from the latest Toolbox, the toolbox does not load properly causing Revit to hang, and you cannot close the window.

Missing names or values of Sprinkler or Pipe properties in the Properties menu, as shown below.

When selecting the menu [Help|User Manual], you get the error message;

Fitting Definition Trying to Read PDF's

Error while trying to open Acrobat Reader.

Install Acrobat Reader and try again.

When attempting to open HydraLIST after a fresh install, you get the error;

[[ Error Openning (sic) Data ]]

Microsoft Error 53: File not found

The file ??? was not found where specified

"filenamehere is missing and needs restored before before HydraLIST will open"  🤦

Running calc displays this error:

Please confirm your Remote Point reference point has a k-factor or flow and pressure

HydraLIST process freezes at Processing Cover Page Report - Optimizing pipe

Or freezes at processing pipe sketches

Or at optimization

When processing a stock list, the SldReports window reports, "could not find part number for the given pipe type"

Move the window to reveal the Processing Reports window where you'll see which section ID it's having problems with

Clicking OK will report others with similar issues, the process will not complete.

When opening HydraCALC, you get the error "Invalid Property Value" Runtime 380

Certain cells in the HydraBID summary sheet were displaying #NAME? instead of expected totals.