--- a/qiime2/qiime_deblur_denoise-other.xml	Mon Aug 05 01:29:30 2019 -0400
+++ b/qiime2/qiime_deblur_denoise-other.xml	Tue Aug 13 07:46:48 2019 -0400
@@ -9,33 +9,36 @@
 
 --i-demultiplexed-seqs=$idemultiplexedseqs
 --i-reference-seqs=$ireferenceseqs
---p-trim-length="$ptrimlength"
 
-#if $plefttrimlen:
+#if str($ptrimlength):
+ --p-trim-length="$ptrimlength"
+#end if
+
+#if str($plefttrimlen):
  --p-left-trim-len=$plefttrimlen
 #end if
 
-#if $psamplestats:
+#if str($psamplestats):
  --p-sample-stats
 #end if
 
-#if $pmeanerror:
+#if str($pmeanerror):
  --p-mean-error=$pmeanerror
 #end if
 
-#if $pindelprob:
+#if str($pindelprob):
  --p-indel-prob=$pindelprob
 #end if
 
-#if $pindelmax:
+#if str($pindelmax):
  --p-indel-max=$pindelmax
 #end if
 
-#if $pminreads:
+#if str($pminreads):
  --p-min-reads=$pminreads
 #end if
 
-#if $pminsize:
+#if str($pminsize):
  --p-min-size=$pminsize
 #end if
 
@@ -46,7 +49,7 @@
 #end if
 
 
-#if $pnohashedfeatureids:
+#if str($pnohashedfeatureids):
  --p-no-hashed-feature-ids
 #end if