Error on upgrade

[BettonD]

Hi
I am trying to upgrade my Plesk 11.5.30 install to 12.x but I keep getting an error:

Exception: Failed to solve dependencies:
php-devel-5.4.29-35.el6.art.x86_64 requires php-cli(x86-64) = 5.4.29-35.el6.art
Error: The Yum utility failed to install the required packages.
Attention! Your software might be inoperable.
Please, contact product technical support.

I have run the boostrapper repair but the error remains. I'm not sure where to go from here (I am a bit of a noob) so any suggestions would be appreciated.

Thank you

 

[InderS]

Which PHP version is currently installed on your server ?

 

[BettonD]

Hi InderS

Thanks for your reply. I was running PHP 5.5.x but there were many things wrong and I have had to rebuild the server from scratch.
Everything is fine now.