Performance monitors do not work all of a sudden

Performance monitors do not work all of a sudden

 Hi all,

we are using Opmanager for our customers, all of a sudden the performance monitors for a few customers - not all- stopped working. SNMPWalk is able to retrieve data whilst Opmanager self is silent like a ghost. Does this ring a bell with anyone?

Thanks in advance!

Kind regard,

Martin de Pijper

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