--- a/macros.xml	Mon Oct 01 01:06:08 2018 -0400
+++ b/macros.xml	Thu Oct 25 07:27:07 2018 -0400
@@ -4,10 +4,17 @@
     <xml name="requirements">
         <requirements>
             <requirement type="package" version="@VERSION@">bioconductor-cardinal</requirement>
+            <requirement type="package" version="3.5.1">r-base</requirement>
             <yield/>
         </requirements>
     </xml>
 
+    <xml name="print_version">
+        <version_command><![CDATA[
+echo $(R --version | grep version | grep -v GNU)", Cardinal version" $(R --vanilla --slave -e "library(Cardinal); cat(sessionInfo()\$otherPkgs\$Cardinal\$Version)" 2> /dev/null | grep -v -i "WARNING: ")
+        ]]></version_command>
+    </xml>
+
     <token name="@INPUT_LINKING@"><![CDATA[
         #if $infile.ext == 'imzml'
             ln -s '${infile.extra_files_path}/imzml' infile.imzML &&
@@ -33,14 +40,14 @@
 
         #if $infile.ext == 'imzml'
             #if str($processed_cond.processed_file) == "processed":
-                msidata <- readImzML('infile', mass.accuracy=$processed_cond.accuracy, units.accuracy = "$processed_cond.units")
+                msidata <- readImzML('infile', mass.accuracy=$processed_cond.accuracy, units.accuracy = "$processed_cond.units", attach.only=TRUE)
                 centroided(msidata) = $centroids
             #else
-                msidata <- readImzML('infile')
+                msidata <- readImzML('infile', attach.only=TRUE)
                 centroided(msidata) = $centroids
             #end if
         #elif $infile.ext == 'analyze75'
-            msidata = readAnalyze('infile')
+            msidata = readAnalyze('infile', attach.only=TRUE)
             centroided(msidata) = $centroids
         #else
             msidata = loadRData('infile.RData')
@@ -177,7 +184,8 @@
         <param name="filename" type="text" value="" label="Title" help="Will appear in the pdf output, if nothing given it will take the dataset name">
             <sanitizer invalid_char="">
                 <valid initial="string.ascii_letters,string.digits">
-                    <add value="_" />
+                    <add value="_"/>
+                    <add value=" "/>
                 </valid>
             </sanitizer>
         </param>
@@ -198,12 +206,12 @@
         <param name="feature_header" type="boolean" label="Tabular file contains a header line" truevalue="TRUE" falsevalue="FALSE"/>
     </xml>
 
-    <xml name="reading_2_column_mz_tabular">
-        <param name="calibrant_file" type="data" optional="true" format="tabular"
+    <xml name="reading_2_column_mz_tabular" token_optional="false">
+        <param name="calibrant_file" type="data" optional="@OPTIONAL@" format="tabular"
             label="m/z of interest (e.g. internal Calibrants)" help="one column with m/z values, optional second column with names (m/z values can also be selected as name)"/>
-        <param name="mz_column" data_ref="calibrant_file" label="Column with m/z values" type="data_column"/>
-        <param name="name_column" data_ref="calibrant_file" label="Column with name of m/z values" type="data_column"/>
-        <param name="calibrant_header" type="boolean" label="Tabular file contains a header line" truevalue="TRUE" falsevalue="FALSE"/>
+        <param name="mz_column" data_ref="calibrant_file" optional="@OPTIONAL@" label="Column with m/z values" type="data_column"/>
+        <param name="name_column" data_ref="calibrant_file" optional="@OPTIONAL@" label="Column with name of m/z values" type="data_column"/>
+        <param name="calibrant_header" type="boolean" optional="@OPTIONAL@" label="Tabular file contains a header line" truevalue="TRUE" falsevalue="FALSE"/>
     </xml>
 
     <xml name="reading_pixel_annotations">