It works!!!

TCPSession.h

@@ -79,7 +79,7 @@ namespace core {
       /// received. If you need data split by line termination characters then
       /// override the onLineReceived method instead.
       ///
-      virtual void onDataReceived(coreutils::ZString data) override;
+      virtual void onDataReceived(coreutils::ZString &data) override;
 
       ///
       /// Override the onLineReceived method to receive a string of characters that
@@ -88,7 +88,7 @@ namespace core {
       /// this method explicitly using the class and member name.
       ///
 
-      virtual void onLineReceived(coreutils::ZString line);
+      virtual void onLineReceived(coreutils::ZString &line);
 
       ///
       /// Override the onBlockReceived method to receive a string of characters that
@@ -97,7 +97,7 @@ namespace core {
       /// calls this method explicitly using the class and member name.
       ///
 
-      virtual void onBlockReceived(coreutils::ZString block);
+      virtual void onBlockReceived(coreutils::ZString &block);
 
       ///
       /// This method is called from within the protocol method when protocol is called
@@ -117,7 +117,7 @@ namespace core {
       /// data through the protocol method: LINE or BLOCK.
       ///
 
-      virtual void protocol(coreutils::ZString data);
+      virtual void protocol(coreutils::ZString &data);
 
       ///
       /// Use setBlockSize to set the amount of data that should be read at once from the