diff --git a/pipeline.py b/pipeline.py
index 884609f..7620afd 100644
--- a/pipeline.py
+++ b/pipeline.py
@@ -327,6 +327,8 @@ if __name__ == '__main__' :
 				job.name = 'generator # '+str(index)
 				job.start()
 				jobs.append(job)
+				if len(jobs) == 1 :
+					job.join()
 
 			print (["Started ",len(jobs),"generators" if len(jobs)>1 else "generator" ])
 			while len(jobs)> 0 :