Hello CodeSheperd, Thank you for your reply, I am following this how tos,https://developer.community.boschrexroth.com/t5/Communication/ctrlX-CORE-gt-OPC-UA-server-app-potentially-not-compatible-with/m-p/11816/thread-id/77?attachment-id=3181 I have checked with Peter see attached that windows CE cannot work with the security mechanism of OPC_UA. i have switched off the security mechanism by using NONE 'Security' configuration and NONE 'TOKEN 'configuration. However when i tried connecting the VH21 to the ctrlX sometime it worked sometime it doesnt work. It requires me to trial and error by removing and adding security mechanism in the ctrlX till it work.
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