Unhandled Exception - System.FormatException: Input string was not in a correct format 

When clicking the abacus to enter a length, you get this error;

Unhandled exception has occurred in a component in your application.  If you click Continue, the application will ignore this error and attempt to continue.

Index and length must refer to a location within the string.  Parameter name: length

When opening HydraCAD you get the error;

Exception in hcadmainbase.arx ARX Command

Unhandled Exception c0000027 (c0000027h) at address aca746e7h

Command Failure for External Command... Autodesk.Revit.Exceptions.InvalidOperationException: DisplayStyle cannot be modified

Error creating view

When attempting to view a clash from Clash Results, it shows this error: Error creating view

When running AutoCALC, the process stops around step 2.4c and you get a Run-time error 457, "This key is already associated with an element of this collection

While trying to install HAM from the G:\ drive, you get this error message.

Application Install - Security Warning

Your administrator has blocked this application because it potentially poses a security risk to your computer.  Your security settings do no allow this application to be installed on your computer

Trying to run as administrator makes no difference.

When a new version of HydraKEY comes out, if it is installed within the first few hours of release, you may not get the updated version or you may continue to get the message to upgrade, but to the previous version.

While using the 'Choose Part Number' button to open HydraHEAD Selector and retrieive its description and part number, you get the errors below;

Runtime Error 713, Application-defined or object-defined error

When starting the Pretty Pipes command, you get an Unhandled Exception error including 'Could not find a part of the path'

Another error may mention blockoffsets.dat

After starting the Move Main command (MMA), and selecting the main to move, the system freezes and the only way to get out is to end task in the Task Manager

No error, pump just doesn't insert 

When selecting a pipe for the Move Main command, you get a fatal error

When selecting the pipe to move in the move line command, you get the error;

Error!!  Restart command, and select a different pipe..

When trying to process a job, you get the error;

Could not Initiate Process called for by: C:\HES\Hydlist\Ver50\Programs\SldReports.exe

After editing riser nipples/vertical pipes with the CRN command, the indicator diamonds reappear

Even if you restart the command and cancel, they remain

When you insert your vertical pipe/riser nipple, you see the text "HCAD/D_UNITS" as the diameter's suffix

When inserting a vertical pipe, the pipe diameter's suffix doesn't match the regular pipe nor the drawing's setting

When trying to size a pipe, you get the message, "Warning! - Z Coordinates have been detected and must be removed!

Pick OK to begin Phase One elimination