This is my first test case, which compiles and works well under 2409 and fails to compile under 2513 with error:
Error (E589) Member “test.__Global.SPathSeparators” is less visible than inlined method “method TWhatever.SecureParentPath(aSeparators: sequence of remobjects.elements.rtl.String): remobjects.elements.rtl.String” it is used from Test D:\RemObjects\Test\Program.pas 17
This is an as-designed change. Default visibility oil Oxygene is “Assembly”, but by mistake globals were always treated as “public” on some platforms. You will now need to mark them as public, if you want them visible outside the assembly.