catching exception from recommendations

data.py

@@ -176,7 +176,10 @@ def main():
 
     if need_to_aggregate is True:
         aggr = aggregator.get_aggregator(job_id, "pdf")
-        recommendations = rcm.get_recommendations(aggr)
+        try:
+            recommendations = rcm.get_recommendations(aggr)
+        except:
+            recommendations = ["Error occured during recommendations generation"]
 
     if args.output_dir is None:
         merge_and_out(job_id, aggr, recommendations, args.type, cache)