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Unable to install CallGraph Viewer 0.9.0 (from the Eclipse Marketplace)

I have been unable to install  CallGraph Viewer 0.9.0 (from the Eclipse Marketplace)  into Code Composer Studio (version 6.1.0.00104).  I get the error message that CallGraph requires  'org.eclipse.pde.ui.3.8.0' but it could not be found.

Any suggestions as to the cause of and solution to this error would be appreciated.