Error Debugging WFM: ActivityId client Exheption data level

Hi,

I'm trying to debug workflow in Workflow manager 1.0, everything runs correctly, but in the method client.Instances.Get(workflowName, instanceId) return the error "ActivityId client Exheption data level ... ActivityId: XXX. NodeId: XXX. Scope: XXX.: XXX".

I search in DB but the activityId XXX and Scope XXX does not exist.

Every time I call the method "client.Instances.Get(workflowName, instanceId)" the ActivityId change but not exist in DB.

Thanks

Samuele