When you open a report, Report Builder verifies that the report contains only one Report Definition Language (RDL) <Section> element. Opening a report with multiple <Section> elements is not supported.
Although a report definition with multiple sections can be generated programmatically, editing the report in a report authoring environment is not supported.
To identify the current report definition format for a report, for a report server, for a project, or for your report authoring environment, see Find the Report Definition Schema Version (SSRS).
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