I get messages like this from time to time for our scheduled snapshots on a PS6000:

[ID: 4.18] Schedule 4 Hour for volume mesa has fewer than expected snapshots.  Expected 8, but the volume only has 0.

But when I check group manager, the proper number of snapshots exist and I have no problem creating a new one. The error is generally kind of random and usually happens for one of two particular LUNs. Also, it usually detects fewer than expected (like 5 instead of 8). This morning, one message listed 5 different LUNs and said all had zero snapshots. I checked each LUN, and all had the proper number of snapshots.

It's waiting for the latest firmware update, but it's not very far out of date. This has been going on for at least a year, so I've mostly been ignoring it since the problem seems to be cosmetic. Is there something else I should check?