ok got it. I added in the customer table 2 new fields "No..," and "No..".. this caused to break the Odata Service..
So when publishing the customer page card it caused this error.
Sadly Navision did not warn when editing the page, but only when restarting the Service or at the request you get Segment not found because navision was not able to populate the wcf service correctly.
hope it helps someone out there..