I recently tried to use the "show risdb query phone" in CUCM 8.6 CLI but it didnt work instead it gave me "openMMF on PhoneTable failed." error message. I have tried Searching it online but found nothing.
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In normal working conditions, you would see this error if there are no IP Phones registered to the node (or CCM service is deactivated) against which you ran this query.
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Thanks for your help, I was using that command in the publisher while the phones were registered in Subscriber
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