Scheduler Failed Running: DM_GWPipeline_Gateway_SpooledOperationMissing

Hi,

I may need help about issue below. 

Scheduler failed running by shwing this Gateway_SpooledOperationMissing error. 

This issue happen since yesterday afternoon. This morning I have tried to restart the gateway and schedule auto refresh at 930am and it running successfully. When come to next auto refresh, the same error shown.

{"error":{"code":"DM_GWPipeline_Gateway_SpooledOperationMissing","pbi.error":{"code":"DM_GWPipeline_Gateway_SpooledOperationMissing","parameters":{},"details":[],"exceptionCulprit":1}}} Table: V_QA.