Hi Eduardo,
This is a known issue - UGENE needs Qt which is not younger than Qt which was used for build process. In the next release we will workaround the issue.

For now, just try to add path to the new Qt binaries to LD_LIBRARY_PATH environment variable.
For example:

export LD_LIBRARY_PATH=/usr/local/Trolltech/Qt-4.5.2/lib:$LD_LIBRARY_PATH

Hi Samia,

Here some details about the problem in general:

UGENE normally uses a QT version shipped with upcoming Linux distro in Ubuntu and Fedora words. Now it's 4.6.2 so we test UGENE with it and make dependency on it.

It's not always possible to test UGENE with the previous QT version and claim that it will work with the latter one. A good example is the recent change in Qt 4.6 with graphics scene mode that made UGENE that worked with 4.5.x fine to fail with Qt 4.6

In your case there are several options:

1) Update QT libraries to the latest version. Probably you will need to use a special Linux distribution mirror to access to it.

2) Lower QT version dependancy in UGENE sources and build UGENE form the source

3) Install prebuilt QT4.6.2 snapshot from http://qt.nokia.com, modify ugene running script to using it. (by adding Qt4/bin to the PATH and LD_LIBRARY_PATH variable

4) Wait until the next release (v1.6.2) that will be released next week. With this release we plan adding a prebuilt version for 32 and 64 bit Linux that should work on all modern Linux versions. All you will need is just to unpack it to some folder.

If you checked any of these recipes and the recipe doesn't work for you, please provide us with step-by-step details of what you did, so we can provide more detailed support.