Basic getting value from SQL Call

Hi,

I want to get the value of a SQL Call and assign it to a local variable to use it all over the flow.

I have tried declaring my variable "DocEntry" like this:

/vpf:Msg/vpf:Body/vpf:Payload[./@Role='C' and ./@id='atom2']/jdbc:ResultSet/jdbc:Row/jdbc:DocEntry/text()

AND

/vpf:Msg/vpf:Body/vpf:Payload[./@Role='C' and ./@id='atom2']/jdbc:ResultSet/jdbc:Row/jdbc:DocEntry

These are my simple SQL Queries:

When running and debugging the variable is NAN

What am I missing? Why is my variable NAN?

Thank you all.

AM