Lawson Resource Query node - serviceName attribute

Hello,

I have a Lawson resource query node the queries the employee on the service TEST_EMPLOYEE with this code and it works.

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I want to change it so that the serviceName is a variable so the flow can move easily between the test and prod systems.  In the production system, the service is called PROD_EMPLOYEE.  I created a variable called EmpService to hold either TEST_EMPLOYEE or PROD_EMPLOYEE.  When I tried to do a variable substation in the node such as:

serviceName = "", I get the message that serviceName can not contain "<" which I think means it is not performing the variable substitution I expected.  I tried variable on setting serviceName but I can't get it to work.  Any suggestions?

Regards,

Patricia