Unable to communicate with CLS server
My client is using ABB Compact HMI 5.1 and the system is running without any problem for the past 2 years. Lately they just informed that the system is not operating with some messages.
Client Station Message : Unable to communicate with CLS server. Error returned while attempting to open connection = 0x80072efd.
Server Station : From the license Status Viewer
Error code = 0 x 4ABBFO
Error Details : Unable to contact CLS server, the client has been granted temporary license.
CLS is based on IIS. A lot can be verified with basic IIS, IE and HTTP troubleshooting.
1) Verify IIS service is running in CLS node, eg try typing http://localhost in address field of IE - the IIS "under contruction" page should be presented. If not, fix IIS!
2) Try ABB License Assignment Editor URL in IE from different nodes. The LAE web page should load when called in IE from any machine in domain/workgroup and list content of .SLA file loaded into CLS. If not, remove & reinstall ABB Third Party common, ABB 800xA CLS components, .SLA file, etc.
3) A wrong proxy setting can cause this error. If proxy is used, ensure CLS node is exempted from being proxied.
Ultimately, file a support case with regional ABB support center.