Hi Sonu, I checked, and that warning can only come if you open with "r" mode. The issue is that you've called the function with an extra argument nil in place of the access mode, and so it's defaulting to "r" mode. You would need: dbOpenCellViewByType("dummy" "dummy_cell" "layout" "maskLayout" "w") ; don't pass nil between the viewType and the mode The view name can be whatever you want, but assuming you want to represent layout data (i.e. such that it will open in the layout editor), then "maskLayout" is the only choice that makes sense for layout data. The documentation lists the four viewTypes used nowadays - maskLayout, schematic, schematicSymbol and netlist. Andrew.
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