I was attempting to enable statistics on a VNX5300 running the most current release of the R31 train. I found that the stats were apparently already running, but only for a duration of 2 days. I wanted 7 days, so I tried stopping the logging. Unisphere gave me this gem of an error message:
I couldn’t get it working via NaviSecCLI either. On a whim, I fired up an older version of the Unisphere client that was installed on my laptop and it was able to stop and restart statistics collection.