Account Confirmation in CRM WEBUI

Hello,

I have requierment to confirm account on dispute selection

Wrote below code but getting dump   CALL METHOD lr_entity->if_bol_bo_property_access~set_property

DATA:
             lr_entity TYPE REF TO cl_crm_bol_entity.

     lr_gdc ?= cl_crm_ui_data_context_srv=>get_instance( ).
     TRY.

         CALL METHOD lr_entity->if_bol_bo_property_access~set_property
           EXPORTING
             iv_value     = lv_guid
             iv_attr_name = 'BP_GUID'.
       CATCH cx_sy_move_cast_error.
     ENDTRY.


     lr_gdc->set_entity( name = 'CURRENTCUSTOMER' value = lr_entity ).

When i confirmed account from account identification view then i am able to read account by below code

* get bp
     lr_bdc = cl_crm_ui_data_context_srv=>get_instance( me ).

     IF lr_bdc IS BOUND.
       lr_bp = lr_bdc->get_entity( name  = 'CURRENTCUSTOMER' ).
       IF lr_bp IS BOUND.
*     BP_NUMBER
*   Get contact person number
         CALL METHOD lr_bp->get_property_as_value
           EXPORTING
             iv_attr_name = 'BP_NUMBER'
           IMPORTING
             ev_result    = lv_customer.
       ENDIF.
     ENDIF.

But where i am wrong on setting the global parameter of account.

Pls help me