Since this is a matter of consulting due to the FM REUSE_ALV_GRID_DISPLAY not being released for customer to use, according to SAP guidelines (KBA 2973358), we are recommending to use the SAP Community for how-to questions. Please use SAP Community for follow-up questions as well.
Instead of REUSE_ALV_GRID_DISPLAY the object model can be used for customer's development - Methods of the class CL_GUI_ALV_GRID
See notes:
551605 - ALV FAQ - General information
166681 - Use of ALV components not released externally
109533 - Use of SAP function modules
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