Andrew, thank you for your suggestions. I have tried all you have suggested before writing for help.
ok, to try and unconfuse my question. Before i upgraded to Mavericks, iPhoto and Aperture, I hade mountain lion and the latest updates at that time of Aperture and iPhoto.
My photo library is an Aperture library which i share with both iPhoto and Aperture. This worked very well together, for fault messages.
I upgraded to Mavericks, iPhoto to 9.5 and Aperture to 3.5. Once install was completed, i opened Aperture, a messaged appeared asking to upgrade the library which i did. this took a little while. i then left Aperture to complete all its processing of importing all the details into Aperture this took an hour or 2. once this was completed, i checked my library in Aperture and everything was there.
I closed down Aperture and i opened iPhoto, the following fault message appeared,
To open this Aperture library in iPhoto, it first needs to be upgraded with Aperture 3.3 or later. Quit iPhoto and then open your library in Aperture to upgrade it.
I quite iPhoto and tired to the option of selecting the library from the iPhoto prestart menu. I had the same error message. i tried carrying out an repair with the prestart menu of aperture which only had the same error message come up. i tried using the my back up aperture library and doing the whole process again, the same message appears. i have reloaded the iphoto and aperture updates incase there was some kind of app error. The same error message appears.
However after doing some investigating in aperture i found that there is an option under 'file' to open the library in iPhoto. doing this my aperture then opens iPhoto, aperture quite's and iphoto opens.
after quitting iphoto, and restarting it the same same fault message appears that i have to upgrade my aperture library.
i hope that this clears my fault up a bit. please any suggestions would be most grateful.