--- a/qiime2/qiime_diversity_alpha-rarefaction.xml	Mon Aug 05 01:29:30 2019 -0400
+++ b/qiime2/qiime_diversity_alpha-rarefaction.xml	Tue Aug 13 07:46:48 2019 -0400
@@ -8,7 +8,11 @@
 qiime diversity alpha-rarefaction
 
 --i-table=$itable
---p-max-depth="$pmaxdepth"
+
+
+#if str($pmaxdepth):
+ --p-max-depth="$pmaxdepth"
+#end if
 
 #if str($iphylogeny) != 'None':
  --i-phylogeny=$iphylogeny
@@ -19,15 +23,15 @@
 #end if
 
 
-#if $pmindepth:
+#if str($pmindepth):
  --p-min-depth=$pmindepth
 #end if
 
-#if $psteps:
+#if str($psteps):
  --p-steps=$psteps
 #end if
 
-#if $piterations:
+#if str($piterations):
  --p-iterations=$piterations
 #end if
 
@@ -35,7 +39,7 @@
 #def list_dict_to_string(list_dict):
 #set $file_list = list_dict[0]['additional_input'].__getattr__('file_name')
 #for d in list_dict[1:]:
-	#set $file_list = $file_list + ',' + d['additional_input'].__getattr__('file_name')
+	#set $file_list = $file_list + ' --m-metadata-file=' + d['additional_input'].__getattr__('file_name')
 #end for
 #return $file_list
 #end def