The inputs for your rollup are all PI Point DRs, is that right?
I would think that the Rollup Analyses will calculate based on the underlying PI tag's "Step" attribute. Current, are these input tags set to Step=Off? Have you played around with setting them to Step=On and evaluating the rollup?
Yes I am using the PI Point DR. The associated tags are set to stepped, but they are indirectly used through another attribute, which is also set to stepped.
I have had one of the other guys I work with look at the issue too and has come to the same conclusion.
For clarity for all PI Square users who might be looking here:
Richard has opened a case with our Tech Support regarding this case. Our TS engineer is reproducing the issue, and will work with our Analytics team should it be confirmed that there's a genuine issue/enhancement required to the Rollup method.
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We have been unable to replicate the issue, where we had restarted the AF and related Analysis services.
What we have found is that aspects of analyses appear to stop working, provide unexpected results, evaluate does not work. We resolve this by simply stopping the AF Analysis service, restarting the AF service, then restarting the Analysis service again, then all seems to be good.
We are running AF 2.6, the business environment that we are in, where there are a lot of systems and projects dependencies, does not make upgrades easy, the task is a small scale project; the issues are seen on development servers, but less so on QA, pre-production and production, where multiple projects come together, so you have to consider interference. The project that I am working on has 11000 analyses, and counting, with a large number of configuration changes to both elements and templates, which is where some of the issues are coming from. Also, interruptions to SQL sever occur, which just adds to our problems.
My advice, should you see some unexpected analyses issues, is restart the Analysis service, but also consider the same for the AF service, after you have done some initial investigation, then see if the issue still exists.