Error GateWay 'CX_SY_RANGE_OUT_OF_BOUNDS'

I got this error 'CX_SY_RANGE_OUT_OF_BOUNDS' when define SAP System alias and task type in 'Task Definition For Scenario'

Error short text : Invalid partial field access: Length is too large

I made this step when define workflow scenario.

SAP Reference IMG : SAP NetWeaver -> Gateway Service Enablement -> Content -> Task Gateway Service -> Scenario Definition