Carlos,
Are you using a copy of the files in VFP9? Did you copy the PJT along with the PJX file?
A new project can easily be constructed, bu starting a new project, add the main program file and then BUILD PROJECT.
>We are running a VFP6 application. When rebuilding the project in VFP9 we get an error : 'Memo file application_name.pjt is missing or is invalid'.
>
>Does someone have the solution for it ?