Some of you might call user maintenance transaction PPOMA_BBP from WebGUI. However some functionalities are not working such as 'Select Attribute'.
In a pure GUI system, the system hits the standard call stack below. The variable gs_act_info-refr is always set to abap_true (i.e. 'X') when selecting the attribute.
However if you are calling the user maintenance from WebGUI, this variable needs to be set to abap_false (' ') in order to display the attribute list on the web.
Therefore reset the variable gs_act_info-refr manually in debugger to ' ' and the attribute list will be displayed.
Consider to change the coding logic in LBBP_OM_DIALOG_AF01 to make this work in webgui:
Or you may add your own enhancement here to change the variable value.