SAP design studio freezes in content assist

Hi,

my current version of design studio is 1.3 SP1. as soon as i open the content assist, the tools starts throwing errors like "Xtext validation" ,"key binding conflicts occured" etc... eventually freezing. i tried to uninstall and reinstall the toll but still no luck. please help me resolve the issue.

below are some errors

"org.eclipse.xtext.validation.ResourceValidatorImpl  -"

"org.eclipse.xtext.ui.shared.internal.Activator  - Disabling JDT use. : org/eclipse/jdt/core/JavaCore"

"org.eclipse.xtext.builder.clustering.ClusteringBuilderState  - Error validating platform:/resource/com.sap.ip.bi.zen/repository/Ad.ztruea2BMtSkec_a0j1I/content.biapp"

Thanks,

karthik