Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Revision history [back]

This seems be not strictly related to ROS and is a known (but apparently not yet fixed) issue. See for instance this bug report on launchpad. It appears two possible workarounds are

Install QtCreator from a PPA (I think this one is meant in the bug report I linked above).
Install QtCreator using the installer script from the Qt website.

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.