This poller error means that the MTF assigned to a specific element upon discovery has been corrupted and can no longer be identified.
Pgm nhiPoller[Net]: Error reading (possibly missing) MTF '$NH_HOME/poller/mmm-mmm-mmm-mmm.mtf', corresponding elements cannot be polled.
eHealth (all supported versions)
All supported platforms
If the issue persists after applying the steps above, you may have an element that no longer exists on a device. eHealth is trying to poll it but erriorng out since it can no longer poll the element. Please run the commands below and determine which elements listed are no longer useful in your configuration and remove them by deleting them.
nhListElements -where "mibTranslationFile matches cisco-cat-mib2-enet-hd-v2c-hs-IF-20.mtf"
nhListElements -where "mibTranslationFile matches mib2-nu-v2c-hs-IF-20.mtf"
Let the polling cycle complete several times and the issue should be gone.