How to flip, copy and flatten instances at once in top gds?

Hello everyone,

I'm using ICADV12.3-64b

I've been trying as like below,

1) copy instance A to instance B with changing name(ex, D1 to D2) in top gds.
2) at instance B, flip B by MX and copy.

3) flatten original B and flipped B to B2.

4) B2 will has double height structure compared with A.

Actually, I have no idea how can I flip and flatten instance B2.

Could you guys help me? This is my example code.

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cvId = dbOpenCellView(inst~>libName inst~>cellName inst~>viewName nil "a");
rexCompile("_D1_") new_cell_name = rexReplace(inst~>cellName "_D2_" 1)

new_cell = dbCopyCellView(cvId cvId~>libName new_cell_name "layout" nil nil t)
new_cvId = dbOpenCellViewByType(cvId~>libName new_cell_name "layout" "maskLayout" "a")
Change_D1_to_D2();

========================================================================

Best regards,

JJ