--- a/qiime2/qiime_sample-classifier_maturity-index.xml	Wed Jul 17 03:26:16 2019 -0400
+++ b/qiime2/qiime_sample-classifier_maturity-index.xml	Thu Jul 18 12:19:15 2019 -0400
@@ -8,6 +8,7 @@
 	<![CDATA[
 	qiime sample-classifier maturity-index --i-table=$itable
 
+	#if $input_files_mmetadatafile:
 	#def list_dict_to_string(list_dict):
 		#set $file_list = list_dict[0]['additional_input'].__getattr__('file_name')
 		#for d in list_dict[1:]:
@@ -16,7 +17,11 @@
 		#return $file_list
 	#end def
 
-	 --m-metadata-file=$list_dict_to_string($input_files_mmetadatafile) --p-group-by="$pgroupby" --p-column="$pcolumn" --p-control="$pcontrol"
+	 --m-metadata-file=$list_dict_to_string($input_files_mmetadatafile)
+	#end fi
+
+
+	--p-group-by="$pgroupby" --p-column="$pcolumn" --p-control="$pcontrol"
 
 	#set $pnjobs = '${GALAXY_SLOTS:-4}'