Homematic: CUX remote control seems to be offline

  • Platform information:
    • Hardware: CPUArchitecture/RAM/storage
    • OS: what OS is used and which version
    • Java Runtime Environment: which java platform is used and what version
    • openHAB version:
  • Issue of the topic: please be detailed explaining your issue
  • Please post configurations (if applicable):
    • Items configuration related to the issue
    • Sitemap configuration related to the issue
    • Rules code related to the issue
    • Services configuration related to the issue
  • If logs where generated please post these here using code fences:

I have created a Cuxd remote control to use for syncing System variables from CCU to openhab. After the System variablen is changed a button is pressed on the remote control. In openhab a rule is triggered which sends a refresh to this varible.

Switch DutyCycleReload "Duty Cycle updaten" (HM_Variables) {channel="homematic:HM-RC-19:PI:CUX2801002:5#PRESS_SHORT"}

in my opinion this remote Control should be online. after I create a Thing following happens within openhab

2018-07-03 19:45:37.974 [INFO ] [g.discovery.internal.PersistentInbox] - Added new thing 'homematic:HM-RC-19:PI:CUX2801002' to inbox.

2018-07-03 19:45:37.977 [home.event.InboxAddedEvent] - Discovery Result with UID 'homematic:HM-RC-19:PI:CUX2801002' has been added.

2018-07-03 19:51:24.372 [me.event.InboxRemovedEvent] - Discovery Result with UID 'homematic:HM-RC-19:PI:CUX2801002' has been removed.

2018-07-03 19:51:24.452 [hingStatusInfoChangedEvent] - 'homematic:HM-RC-19:PI:CUX2801002' changed from UNINITIALIZED to INITIALIZING

2018-07-03 19:51:24.462 [hingStatusInfoChangedEvent] - 'homematic:HM-RC-19:PI:CUX2801002' changed from INITIALIZING to ONLINE

2018-07-03 19:51:25.197 [me.event.ThingUpdatedEvent] - Thing 'homematic:HM-RC-19:PI:CUX2801002' has been updated.

2018-07-03 19:51:25.210 [hingStatusInfoChangedEvent] - 'homematic:HM-RC-19:PI:CUX2801002' changed from ONLINE to OFFLINE (COMMUNICATION_ERROR): -4 Unknown parameter (sending getValue()

The remote Control initializes goes to online and than to offline.
the update process doesn’t work

I don’t see what may be wrong. Did I miss something.
Thanks for Your support