No error but the calculation process takes a very long time and is slow.

The process hangs and usually the RAM runs up to 100%.  You'll likely hear the computer's fan rev up.

Auto Adjust Fittings defaults to unchecked.

When printing final, you get this error message

"Error during Cover Sheet print, possibly due to missing .DAT file"

When right-clicking the Fittings column, you get a MiscFunc Run-time error 5, Invalid procedure or argument

Printing a final calculation to PDF creates a blurry or pixelated cover sheet logo

When running a calculation, the results window pops up but just stalls or hangs there.  

The window will eventually say (Not Responding) and you can't click out of it

After adding a Secondary Curve to your water supply, you decide you don't want it, it's impossible to remove the secondary curve value.

When trying to [Print|Final] in HydraCALC, the user gets a Runtime Error 5, "Invalid Procedure Call or Argument".  HydraVIEW does not open and after clicking OK, HydraCALC crashes.

When editing and saving data for pipes, fittings, or flexible connections, you get a Run-time error 76, Path not found error

Bad location of K-Factor