On 12/07/2010 12:31 PM, François Renard wrote: > I don't understand what you are trying to tell me ! > François here are a couple of ideas: In case RHEL uses yum, try, yum list qt* if not, rpm -q qt3-devel.x86_64 yum will tell you what you have and what's available. rpm will only tell you if this is installed. Greg