+15In Classic UI, I could duplicate Site Map records by assigning different Screen IDs and pointing them to the same URL. When I attempt to switch one of these duplicated records to Modern UI, I get the error below:
I have one client in particular who leans extensively on the ability to duplicate out-of-box screens in order to assign them as unique Entry Points in GIs.
Hi
Yes, this behavior is expected in Modern UI.
The error you’re seeing is caused by an invalid or mismatched Classic UI Site Map URL. Modern UI enforces a strict one-to-one mapping between the Screen ID and the physical page path. When duplicated Site Map entries point to the same underlying page (a pattern that worked in Classic UI), Modern UI fails validation and throws:
“No data is found by the ~/Pages/DX/DXMP1000.aspx path.”
Resolution:
Open Site Map (SM200520) and correct the Classic UI page URL for the affected Screen ID so it matches the actual system page path. Once the URL is corrected, the screen will successfully load in Modern UI.
Hope this helps clarify the behavior.
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