Error Report

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Listings: 
Error Code: 
4
Error Message: 
Operation details
Installable Units Reported: 
net.sf.versiontree.feature.group,1.7.2.201308061545
Detailed Message: 
Cannot complete the install because one or more required items could not be found. Software being installed: CVS VersionTree Plug-in 1.7.2.201308061545 (net.sf.versiontree.feature.group 1.7.2.201308061545) Missing requirement: CVS VersionTree Plug-in 1.7.2.201308061545 (net.sf.versiontree.feature.group 1.7.2.201308061545) requires 'org.eclipse.team.cvs.ui 0.0.0' but it could not be found