[Pydev-users] [Users] NoSuchFieldError when viewing coverage

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The following forum message was posted by fgordon at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4534573:

I'm using Eclipse 3.4 and installed PyDev 2.0.0.2011040403.
When I enabled code coverage for new launches and ran a script, it appears to
generate coverage information for me, but when I try selecting a folder in the
Code Coverage Results View, I get an error about java.lang.NoSuchFieldError.

Digging into the logs, I find the following snippet:

!ENTRY org.eclipse.jface 4 2 2011-05-17 14:31:19.857
!MESSAGE Problems occurred when invoking code from plug-in:
"org.eclipse.jface".
!STACK 0
[b]java.lang.NoSuchFieldError: org/eclipse/swt/custom/StyleRange.data[/b]
	at org.python.pydev.debug.codecoverage.CoverageCache.getStatistics(CoverageCach
e.java:255)
	at org.python.pydev.debug.codecoverage.PyCodeCoverageView.onSelectedFileInTree(
PyCodeCoverageView.java:350)
	at org.python.pydev.debug.codecoverage.PyCodeCoverageView.access$2(PyCodeCovera
geView.java:343)
	at org.python.pydev.debug.codecoverage.PyCodeCoverageView$SelectionChangedTreeA
ction.run(PyCodeCoverageView.java:338)
	at org.python.pydev.debug.codecoverage.PyCodeCoverageView$SelectionChangedTreeA
ction.runWithEvent(PyCodeCoverageView.java:329)
	at org.python.pydev.debug.codecoverage.PyCodeCoverageView$12.selectionChanged(P
yCodeCoverageView.java:847)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:162)


...Any idea what might cause this error, and how to resolve it?