diff --git a/server/AyaNova/biz/JobsBiz.cs b/server/AyaNova/biz/JobsBiz.cs
index 7669a28b..0d2198e7 100644
--- a/server/AyaNova/biz/JobsBiz.cs
+++ b/server/AyaNova/biz/JobsBiz.cs
@@ -401,7 +401,13 @@ namespace AyaNova.Biz
                     case JobType.BatchCoreObjectOperation:
                         //batch op, hand off to biz object to deal with
                         //note, convention is that there is an idList in job.jobinfo json if preselected else it's all objects of type
-                        o = (IJobObject)BizObjectFactory.GetBizObject(job.AType, ct, 1, AuthorizationRoles.BizAdmin);
+
+                        //case 4357
+                        var tempObject=BizObjectFactory.GetBizObject(job.AType, ct, 1, AuthorizationRoles.BizAdmin);
+                        if(! (tempObject is IJobObject)){
+                            throw new System.NotSupportedException($"ProcessJobAsync type {job.JobType.ToString()} is not supported for Batch operations");
+                        }
+                        o = (IJobObject)tempObject;
                         break;
                     case JobType.RenderReport:
                         o = (IJobObject)BizObjectFactory.GetBizObject(AyaType.Report, ct, 1, AuthorizationRoles.BizAdmin);