Common Error Messages The Common Error Messages section is a quick way to find solutions for some of the error messages in Spectrum. Error - Customer Code Entered is not Available For Use Error - Equipment Code Entered is not Available For Use Error - G/L Account Code Entered is not Available For Use Error - Job Entered has a Completed Status Error - Phase Code Entered is not Available For Use Error - Update Cannot be Performed Until all Cards are In Balance Error - Update Cannot be Performed Until Statement is In Balance Error - Vendor Code Entered is not Available For Use