--- a/qiime2/qiime_cutadapt_demux-single.xml	Wed Jul 17 03:26:16 2019 -0400
+++ b/qiime2/qiime_cutadapt_demux-single.xml	Thu Jul 18 12:19:15 2019 -0400
@@ -12,6 +12,8 @@
 --o-per-sample-sequences=opersamplesequences
 --o-untrimmed-sequences=ountrimmedsequences
 
+
+#if $input_files_mbarcodesfile:
 #def list_dict_to_string(list_dict):
   #set $file_list = list_dict[0]['additional_input'].__getattr__('file_name')
   #for d in list_dict[1:]:
@@ -19,8 +21,8 @@
   #end for
   #return $file_list
 #end def
-
 --m-barcodes-file=$list_dict_to_string("$input_files_mbarcodesfile")
+#end if
 
 #if $perrorrate:
  --p-error-rate=$perrorrate