Dump

This loop is creating a dump with error ' No roll area '

How to solve this..

LOOP AT GT_BPSTAB INTO WA_BPSTAB.

Case lv_counter.

when '12 '.

*IF LV_COUNTER = 12.

*FORMAT COLOR COL_KEY INTENSIFIED ON.

WA_BPSTAB-COLOR_LINE = 'C610'.

APPEND WA_BPSTAB TO GT_BPSTAB.

**MOVE WA_BPSTAB TO GT_BPSTAB.

*ENDIF.

when '13'.

*IF LV_COUNTER = 13.

*FORMAT COLOR COL_KEY INTENSIFIED ON.

WA_BPSTAB-COLOR_LINE = 'C910'.

APPEND WA_BPSTAB TO GT_BPSTAB.

*ENDIF.

endcase.

ENDLOOP.