Following the document ( https://help.sap.com/saphelp_uiaddon10/helpdata/en/a1/18094264684230bb6510045b5b5b7c/content.htm?no_cache=true ), UI Theme designer cannot be used if ABAP web dynpro application has HTMLIsland, HTML container, Chart, Flashisland, Sliverlightisland and businessgraphics.
Question : Does FS PER webdynpro applications contain any of these UI elements?
Thanks