--- a/qiime2/qiime_longitudinal_feature-volatility.xml	Wed Jul 17 01:53:11 2019 -0400
+++ b/qiime2/qiime_longitudinal_feature-volatility.xml	Tue Aug 13 07:40:25 2019 -0400
@@ -8,13 +8,15 @@
 qiime longitudinal feature-volatility
 
 --i-table=$itable
+
+
 --p-state-column="$pstatecolumn"
 
 #if str($pindividualidcolumn):
  --p-individual-id-column="$pindividualidcolumn"
 #end if
 
-#if $pcv:
+#if str($pcv):
  --p-cv=$pcv
 #end if
 
@@ -29,7 +31,7 @@
 #end if
 
 
-#if $pnestimators:
+#if str($pnestimators):
  --p-n-estimators=$pnestimators
 #end if
 
@@ -101,7 +103,7 @@
 			<option value="ignore">ignore</option>
 		</param>
 
-		<repeat name="input_files_mmetadatafile" optional="True" title="--m-metadata-file">
+		<repeat name="input_files_mmetadatafile" optional="True" title="--m-metadata-file  [required]">
 			<param label="--m-metadata-file: Metadata file or artifact viewable as metadata. This option may be supplied multiple times to merge metadata. [optional]" name="additional_input" type="data" format="tabular,qza,no_unzip.zip" />
 		</repeat>