Oracle Soa Suite 12c Decision Table exception.name: A Decision Service of the given name does not exist.

You can find this name in OracleRules1.desc 

<decisionService name="OracleRules1_DecisionService_1"

Write the provided service name in orac:callFunctionStateless

Example: <orac:callFunctionStateless name="OracleRules1_DecisionService_1">