Dear Mone,

we are using official licensed Lightstreamer 5.1.2 version and I can confirm that all events were received successfully and data transmitted well, Issue is concentrated only on implementing DDE. Server to update Excel clients with changeable data received from LightStreamer Server, which is done as I explained but the issue when update received from LightStreamer server it did not update the same item in excel client..why?? Is there a specific way to do so?? or specific steps to follow??

I tried to use RTD as you mentioned and followed all instruction to run Demo, but it not working, how can I run it using our lightstreamer server? and merge it as part of our system??

Can we upgrade to new version of Lightstreamer? what are procedures to follow?

Thanks and best regards...