Customizing spaces task flow in design time

   Hi everybody,

I customized an activity stream task flow, then i deployed the mar file to the managed server "WC_Spaces" using jdevelopper

But when I want to remove this customization using the following WLST script:

deleteMetadata(application='webcenter',server='WC_Spaces',docs='/oracle/wbcenter/activitystreaming/view/jsf/fragments/mdsys/cust/**',excludeBaseDocs='true')

I have this message:

Location changed to custom tree. This is a writable tree with No root.

For more help, use help(custom)

Then the process crashes.

Thanks,