diff --git a/src/Grafoscopio/GrafoscopioNode.class.st b/src/Grafoscopio/GrafoscopioNode.class.st
index efe2ead..3f668c3 100644
--- a/src/Grafoscopio/GrafoscopioNode.class.st
+++ b/src/Grafoscopio/GrafoscopioNode.class.st
@@ -751,7 +751,8 @@ GrafoscopioNode >> metadata [
 GrafoscopioNode >> metadataAsYamlIn: markdownStream [
 	"I convert the first '%metadata' node into a YAML preamble contents to be used by Pandoc 
 	exportation."
-	self metadata 
+	self metadata
+		ifNil: [ markdownStream nextPutAll: String crlf. ] 
 		ifNotNil: [
 			self metadata
 				keysAndValuesDo: [ :k :v | 
diff --git a/src/Grafoscopio/GrafoscopioNotebook.class.st b/src/Grafoscopio/GrafoscopioNotebook.class.st
index 61097e3..6b98eae 100644
--- a/src/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/src/Grafoscopio/GrafoscopioNotebook.class.st
@@ -189,10 +189,18 @@ GrafoscopioNotebook >> exportAsHTML [
 	htmlFile := self markdownFile parent fullName,'/', self markdownFile basenameWithoutExtension, '.html'.
 	htmlFile asFileReference exists ifTrue: [ htmlFile asFileReference delete ].
 	Smalltalk platformName = 'unix' 
-		ifTrue: [OSProcess command: 'pandoc --standalone ', self markdownFile fullName, ' -o ', htmlFile].
+		ifTrue: [
+			OSSUnixSubprocess new 
+				command: 'pandoc'; 
+				arguments: {'--standalone'. self markdownFile fullName. '--output' . htmlFile};
+				redirectStdout;
+				runAndWaitOnExitDo: [ :process :outString :errString |
+					process isSuccess 
+						ifTrue: [ self inform: ('File exported as: ', String cr, htmlFile) ]
+						ifFalse: [ self inform: 'Exportation unsuccesful. Please review that you have
+							installed Pandoc and have used the exportation options properly.' ]]].
 	Smalltalk platformName = 'Win32' 
-		ifTrue: [WindowsProcess command: 'pandoc --standalone ', self markdownFile fullName, ' -o ', htmlFile].
-	self inform: ('File exported as: ', String cr, htmlFile).
+		ifTrue: [WinProcess createProcess: 'pandoc --standalone ', self markdownFile fullName, ' -o ', htmlFile].
 ]
 
 { #category : #persistence }