bpmn20.xml file has errors

[kazuya]

Hi, Attached process1.bpmn20.xml file has following errors;
- cvc-attribute.3: The value 'test.Sample1' of attribute 'activiti:class' on element 'serviceTask' is not valid with respect to its type, 'null'.
- cvc-pattern-valid: Value 'test.Sample1' is not facet-valid with respect to pattern '([a-z]{2,3}(\.[a-zA-Z][a-zA-Z_$0-9]*)*)\.([A-Z][a-zA-Z_$0-9]*)' for type

Does anyone know why these errors was happened?

kazuya

[kazuya]

My posted problem was resolved as following;
My package test for my Delegate class Sample1 was changed to org.activiti.

kazuya