• ATTEMPT_TO_LOAD_AN_OLDER_LICENSE : iText.Licensing.Base.Exceptions.LicenseKeyExceptionMessageConstant
• LICENSE_IS_INCOMPATIBLE : iText.Licensing.Base.Exceptions.LicenseKeyExceptionMessageConstant
• LICENSE_WAS_LOADED : iText.Licensing.Base.Logs.LicenseKeyLogMessageConstant
• LICENSE_WAS_NOT_SET_FOR_A_PRODUCT : iText.Licensing.Base.Logs.LicenseKeyLogMessageConstant
• NEW_LICENSE_IS_INCOMPATIBLE_WITH_EXISTING : iText.Licensing.Base.Exceptions.LicenseKeyExceptionMessageConstant
• WRONG_LICENSE_FILE_VERSION : iText.Licensing.Base.Exceptions.LicenseKeyExceptionMessageConstant