Trying run a calculation as stand-alone, or via AutoCAD/AutoCALC or Revit/AutoCALC, you get this error message;

Run-time error 339:  Runtime error 339  Runtime 339
Component 'MSCOMCTL.OCX' or one of its dependencies not correctly registered: a file is missing or invalid

It's likely a job without a pump works, but one with a pump crashes
 

When trying to print final, the dialog box HydraVIEW, Run-time error 9, Subscript out of range

When trying to edit the company information by going to the menu [Utilities|Alter Company Information], you get the error saying, "Error trying to edit company information", Please get a copy of {\...\Company1.dat} onto this computer".

When attempting to print a final calc, nothing happens and HydraVIEW doesn't open.

You can test this by trying to manually open HydraVIEW.  Go to the Windows START button, scroll down to the letter H, select Hydratec v50 Software, then select HydraVIEW.  It should open to a blank job, but if nothing happens, see below for the possible solution.

You can also manually attempt to navigate to this folder, then double-click HydraVIEW.EXE;

"C:\HES\Common\Ver50\HydraVIEW.EXE"

When trying to add information for a new company [Utilities|Alter Company Info], you get the error message; 

"Missing company data file" "Error trying to edit company information" "Please get a copy of Company1.dat"

When trying to open HydraCALC, the user gets a Runtime Error 5, "Invalid Procedure Call or Argument"

When opening HydraCALC, user is greeted with

Run-time error 62

Input past end of file

Runtime 62 Runtime Error 62

When opening HydraCALC, a runtime-error 380 pops up.

Invalid property value

When opening HydraCALC or trying to run a calculation, the dialog boxes below appear. 

"Loading from Master Data Location" 

"LoadRegValue for StrInstallDrive MasterLoad Form|Activaate = C:"

After clicking OK or pressing ENTER, HydraCALC will open or finish up the calculation