 <p>What Eclipse and Mylyn version are you using ?</p> <p>The is a <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=232664" rel="nofollow noreferrer"><strong>bug</strong></a> somewhat relative to this issue, supposedly fixed, but only in Mylyn 2.3 (in eclipse3.4)</p> <hr> <p>Do not forget, according to the <strong><a href="http://wiki.eclipse.org/index.php/Mylyn/FAQ#Why_am_I_missing_elements_when_I_retrieve_someone_else.E2.80.99s_context.3F" rel="nofollow noreferrer">Mylyn FAQ</a></strong>, that:</p> <blockquote> <p>To identify elements within a project, Mylyn relies on the name of the project being consistent across workspaces.<br> If the project name in the workspace that the context was created with is different than its name in your workspace, the task context will not show elements within that project (<a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=164058" rel="nofollow noreferrer">bug 164058</a>).<br> The other case where context can be lost is if the elements change names outside of the workspace (<a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=164243" rel="nofollow noreferrer">bug 164243</a>). </p> </blockquote> <p>(not exactly your issue, but still something to check)</p>