diff --git a/pom.xml b/pom.xml
index 849d64f..ed6121d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
 	</parent>
 	<groupId>org.gcube.data.transfer</groupId>
 	<artifactId>sis-geotk-plugin</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
+	<version>1.0.0-SNAPSHOT</version>
 	<name>Sis/GeoToolkit plugin</name>
 	<description>Apache Sis/Geotk plugin for data-transfer-service</description>
 
diff --git a/src/main/java/org/gcube/data/transfer/plugins/sis/SISPluginFactory.java b/src/main/java/org/gcube/data/transfer/plugins/sis/SISPluginFactory.java
index 5cbb808..1638c64 100644
--- a/src/main/java/org/gcube/data/transfer/plugins/sis/SISPluginFactory.java
+++ b/src/main/java/org/gcube/data/transfer/plugins/sis/SISPluginFactory.java
@@ -1,5 +1,7 @@
 package org.gcube.data.transfer.plugins.sis;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -9,31 +11,47 @@ import org.gcube.data.transfer.plugin.fails.ParameterException;
 import org.gcube.data.transfer.plugin.fails.PluginInitializationException;
 import org.gcube.data.transfer.plugin.fails.PluginShutDownException;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 public class SISPluginFactory extends AbstractPluginFactory<SisPlugin> {
 
 	static final String PLUGIN_ID="SIS/GEOTK";
-	
+
 	public static final String SOURCE_PARAMETER="SOURCE_FILE";
 	public static final String GEONETWORK_CATEGORY="GEONETWORK_CATEGORY";
 	public static final String GEONETWORK_STYLESHEET="GEONETWORK_STYLESHEET";
-	
+
 	static final Map<String,String> PARAMETERS_DESCRIPTION= new HashMap<String,String>();
-	
+
 	static{
 		PARAMETERS_DESCRIPTION.put(SOURCE_PARAMETER, "[String value] Absolute path of source archive file.");
 		PARAMETERS_DESCRIPTION.put(GEONETWORK_CATEGORY, "[String value] GeoNetwork category for publiehd metadata. Default is 'Dataset'.");
 		PARAMETERS_DESCRIPTION.put(GEONETWORK_STYLESHEET, "[String value] GeoNetwork stylesheet for publiehd metadata. Default is '_none_'.");
 	}
-	
-	
+
+
 	public SISPluginFactory() {
-		
+
 	}
 
 	@Override
 	public void checkInvocation(PluginInvocation arg0) throws ParameterException {
-		// TODO Auto-generated method stub
-
+		log.debug("Checking parameters for {} ",arg0);
+		Map<String,String> params=arg0.getParameters();
+		if(params==null||params.isEmpty()||(!params.containsKey(SOURCE_PARAMETER)))
+			throw new ParameterException(SOURCE_PARAMETER+" is mandatory");
+		String source=params.get(SOURCE_PARAMETER);
+		if(source==null||source.length()==0) throw new ParameterException(SOURCE_PARAMETER+" cannot be null.");
+		try{
+			File f=new File(source);
+			if(!f.exists()) throw new ParameterException(SOURCE_PARAMETER+" ["+source+"] not found.");
+			if(!f.canRead()) throw new ParameterException("Cannot read "+SOURCE_PARAMETER+" ["+source+"].");
+		}catch(ParameterException e){
+			throw e;
+		}catch(Exception e){
+			throw new ParameterException("Unable to access source file ",e);
+		}
 	}
 
 	@Override
diff --git a/src/main/java/org/gcube/data/transfer/plugins/sis/SisPlugin.java b/src/main/java/org/gcube/data/transfer/plugins/sis/SisPlugin.java
index 0445fa7..e8a83b1 100644
--- a/src/main/java/org/gcube/data/transfer/plugins/sis/SisPlugin.java
+++ b/src/main/java/org/gcube/data/transfer/plugins/sis/SisPlugin.java
@@ -6,10 +6,11 @@ import java.util.Map;
 import org.apache.sis.storage.DataStoreException;
 import org.apache.sis.storage.DataStores;
 import org.apache.sis.storage.UnsupportedStorageException;
+import org.apache.sis.xml.XML;
+import org.gcube.data.transfer.model.ExecutionReport;
+import org.gcube.data.transfer.model.ExecutionReport.ExecutionReportFlag;
 import org.gcube.data.transfer.model.PluginInvocation;
 import org.gcube.data.transfer.plugin.AbstractPlugin;
-import org.gcube.data.transfer.plugin.ExecutionReport;
-import org.gcube.data.transfer.plugin.ExecutionReport.ExecutionReportFlag;
 import org.gcube.data.transfer.plugin.fails.PluginCleanupException;
 import org.gcube.data.transfer.plugin.fails.PluginExecutionException;
 import org.gcube.spatial.data.geonetwork.GeoNetwork;
@@ -35,7 +36,7 @@ public class SisPlugin extends AbstractPlugin {
 	@Override
 	public ExecutionReport run() throws PluginExecutionException {
 		try{
-		log.debug("Checking parameters for {} ",invocation);
+		
 		Map<String,String> params=invocation.getParameters();
 		String dataStorePath=params.get(SISPluginFactory.SOURCE_PARAMETER);
 		String category=params.containsKey(SISPluginFactory.GEONETWORK_CATEGORY)?params.get(SISPluginFactory.GEONETWORK_CATEGORY):"Dataset";
@@ -64,10 +65,16 @@ public class SisPlugin extends AbstractPlugin {
 	
 	
 	public static final long publishMetadata(Metadata meta,String category, String stylesheet) throws Exception{
+		File tmp=File.createTempFile("tmp_meta_", ".xml");
+		
+		XML.marshal(meta,tmp);
+		
 		GeoNetworkPublisher publisher=GeoNetwork.get();
 		publisher.login(LoginLevel.DEFAULT);
 		GNInsertConfiguration config=publisher.getCurrentUserConfiguration(category, stylesheet);
 		config.setValidate(false);
-		return publisher.insertMetadata(config, meta);
+		long toReturn= publisher.insertMetadata(config, tmp);
+		tmp.delete();
+		return toReturn;
 	}
 }