XPath references namespace unspecified by the process's properties for parameter 'property name' at activity 'operation name'.
This is an XPath validation message.
Explanation
Resolution
The value of the named property is an XPath expression that contains an undefined namespace.
Perform one of the following tasks:
Define the namespace in the process properties.
Ensure that the namespace is spelled correctly in the XPath expression. (See Creating XPath expressions .)
Remove the namespace from the XPath expression. (See Creating XPath expressions .)
