I have a report which works without problems. I created a new version of that report with two levels of grouping, which works perfectly in Visual Studio. I deployed it to the server (in SharePoint integration mode). The report runs for a while (displaying the spinner) and then I get the error:
An error occurred during client rendering
So it appears to collate the data but chokes when trying to render it.
I can render the report from the server directly to PDF and Excel and that renders correctly. It is just when it tries to render in the browser that it doesn't render.
The Reporting Services log simply shows that it processed the report and doesn't have any errors.
Has anyone got any clues to what might cause this?
When rendering to HTML in Visual Studio (using the save button after rendering in VS) it gave me the following error message:
An error occurred during local report processing.
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
I found this post which suggested that it was to do with items in the header or footer being to big for the header or footer, and particularly mentions images. I have an image in the header. My image looked fine but was 0.00475cm in from the left margin when it should be flush left (and was flush left in the report that this report was copied from). I changed it to be positioned at 0,0 and the report now renders in HTML.
Its the little things...