Abstract: Why do I see the error message "Entered serial number is already registered"?
Why do I see the error message "Entered serial number is already registered"?
If you have Borland Developer Studio installed, the serial number and authorization key fields in the Registration Wizard may be auto filled with your Borland Developer Studio serial number and key.
That serial number and key combination will not work for Delphi for PHP and if you try to continue with the registration process you will see an error message "Entered serial number is already registered. Please enter a non-registered serial number to continue".
If you have a purchased serial number and key for Delphi for PHP, enter those into the fields and continue through the registration process. If you have a trial activation file, exit the Registration Wizard and save the activation file from your email to your user home directory per the instructions in the email and Delphi for PHP will start the next time without prompting you for a serial number.