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Reporting Services Web Part Won’t Save Parameters with SharePoint 2013 SP1

We recently performed an installation of SharePoint 2013 with SP1 for a customer using the slipstreamed ISO available on MSDN. Part of the rollout in this case involved migrating a number of reports from a standalone instance of SQL Server Reporting Services (SSRS) to SSRS running in SharePoint integrated mode. However, during the creation of some new reports, we observed something odd. The custom parameter values were not being saved for web parts that were using these reports.

SSRS web parts in SharePoint allow for a report to be displayed within a web part, a therefore in part of the page. Report parameters created in the report can be exposed as web part properties. Therefore, you can have multiple instances of the same report on different pages using different parameters. You can also connect the web part to other web parts, such as SharePoint filters, and have the parameters driven by these filter values. However, in this particular case, none of it was working. The parameter could be saved, and applied, but when the page was saved, the parameter values would revert to their defaults.

After doing some digging, I came across this discussion on the MSDN forums. The discussion indicated that there may be a regression bug in SharePoint 2013 Service Pack 1 that exhibited this behaviour, and that the application of the May 2014 Cumulative Update had helped them somewhat. We had never seen this issue with builds prior to SP1. Given that our farm had not yet gone live, we quickly acquired and applied the July 2014 CU in the hopes that it would help.

It did.

In our case, it fixed the problem completely, however there was one small negative side effect. All of the web parts that had been added to pages before the update completely lost all of their saved properties, including the report that they were pointing to. In our case, this was no big deal, but if you have a lot of these, it could be an annoyance. I also don’t know if this would happen generally with the July 2014 CU, or it was only because that the original system was affected (as I suspect).

In any event, this apparently was a regression bug introduced with SP1, and applying the July 2014 CU clearly fixed this problem for us. Our new baseline for SharePoint 2013 will not be sP1, but SP1 with the July 2014 CU.

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