Why do I get an error compiler message which states "HHC6003: The file itircl.dll has not been registered correctly"?
The reason is that the file itcc.dll is not on your system or it has not been registered correctly.
Ok, on to the fix:
Look for itcc.dll on your system. If it's there, register it using:
Make sure you substitute the correct path for the location of itcc.dll on your system.