[Qt-creator] No valid Qt version set. Set one in Tools/Options

[Paul Smith]

Dear All,

I am trying to build a project, but getting the following error:

«No valid Qt version set. Set one in Tools/Options
Error while building project exp
When executing build step 'QMake'
Canceled build.»

Any ideas? I am using

$ rpm -q qt-creator
qt-creator-1.3.1-2.fc12.x86_64
$

on Fedora 12.

Thanks in advance,

Paul