diff --git a/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/util/CheckMethod.java b/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/util/CheckMethod.java
index 069f448..08e2ccd 100755
--- a/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/util/CheckMethod.java
+++ b/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/util/CheckMethod.java
@@ -9,6 +9,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Map;
 import java.util.Properties;
 
 import org.gcube.dataanalysis.dataminer.poolmanager.clients.configuration.Configuration;
@@ -186,9 +187,18 @@ public abstract class CheckMethod {
 			
 			
 			this.logger.debug("session created.");
+			this.logger.debug("Session Config:");
+			for (Object key: sshConfig.keySet()) {
+			    this.logger.debug("{} = {} ", key, sshConfig.get(key));
+			}
+			
+			
+			this.logger.debug("SSH Config: {}",sshConfig);
 			session.setConfig(this.sshConfig);
 			session.connect();
 
+			this.logger.debug("Open Channel SFTP");
+			this.logger.debug("Protocol: "+SFTP_PROTOCOL);
 			Channel channel = session.openChannel(SFTP_PROTOCOL);
 			channel.connect();
 			this.logger.debug("shell channel connected....");
@@ -207,6 +217,7 @@ public abstract class CheckMethod {
 			session.disconnect();
 		} catch (Exception e)
 		{
+			this.logger.error("Error in deleteFiles(): {} ",e.getLocalizedMessage(),e);
 			throw new GenericException(e);
 		}