key value map error

[mrshrikant]

I created a new key value map under environment section.  Added new key value pair to it. 

Then referred this newly created KVM inside a KVM policy. 

And used the value in service call out, but its erroring out. The error I am getting is:

{"fault":{"faultstring":"Failed to set variable somevariableName in KeyValueMapStepDefinition someDefinition","detail":{"errorcode":"steps.keyvaluemapoperations.SetVariableFailed"}}}

Please help.