Map/Reduce script FAILED while triggering from Restlet.

Script 
let processTask = task.create({
   taskType:task.TaskType.MAP_REDUCE,
   scriptId:'customscript_hms_fix_hospice',
   deploymentId:'customdeploy_hms_fix_hospice',
    params:{custscript_hms_data_to_be_processed:queRecId}
   })
 try{
   let processId = processTask.submit()
 }catch(err)
 {
   if(err.name != "NO_DEPLOYMENTS_AVAILABLE")
   { // If error except no deployments availble
log.error("error",err);
throw err;
   }
 }

getInputData works fine.
Map reduce work while clicking on save & Execute

Issue: The integration record should have following permissions to access the Map/Reduce script.
Documents and Files -View
SuiteScript - View  
SuiteScript Scheduling 

Solution: Add Documents and Files -View for the integration role.