'Export Plug-ins' has encountered a problem

 

Hello!
 
I get an error dialog box when exporting my KNIME plugin into a zipped jar, containing the following text:
 
'Export Plug-ins' has encountered a problem
Details:
/home/marko/workspace_knime/.metadata/.plugins/org.eclipse.pde.core/temp/org.eclipse.pde.container.feature/compile.org.eclipse.pde.container.feature.xml:4: The following error occurred while executing this line:
/home/marko/workspace_knime/HBaseWriter/build.xml:450: The following error occurred while executing this line:
/home/marko/workspace_knime/HBaseWriter/build.xml:408: java.lang.NoSuchMethodError: org.eclipse.jdt.core.compiler.CharOperation.indexOf([C[CZI)I
The following error occurred while executing this line:
/home/marko/workspace_knime/HBaseWriter/build.xml:450: The following error occurred while executing this line:
/home/marko/workspace_knime/HBaseWriter/build.xml:408: java.lang.NoSuchMethodError: org.eclipse.jdt.core.compiler.CharOperation.indexOf([C[CZI)I
 
Although it is an Eclipse PDE problem related to generated build.xml file (which I cannot inspect), I hope I will get some suggestions.
Thanks

I have reinstalled the eclipse KNIME IDE and it works.

Thanks anyway