Hi @User I created a 4x4 reram array in klayout , generated GDS and trying to read back in magic to generate the LEF file But after reading getting below messages , but no layout appears - Any guesses seeing below messages ? Root cell box: width x height ( llx, lly ), ( urx, ury ) area (units^2) microns: 0.010 x 0.010 ( 0.000, 0.000), ( 0.010, 0.010) 0.000 lambda: 1.00 x 1.00 ( 0.00, 0.00 ), ( 1.00, 1.00 ) 1.00 internal: 2 x 2 ( 0, 0 ), ( 2, 2 ) 4 Main console display active (Tcl8.6.10 / Tk8.6.10) Warning: Calma reading is not undoable! I hope that's OK. Library written using GDS-II Release 6.0 Library name: library Reading "$$$CONTEXT_INFO$$$". Reading "via_new$1". Reading "myComponent_1t1r". Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Moving label "" from metal2 to space in cell myComponent_1t1r. Top-level cells read from GDS file: {$$$CONTEXT_INFO$$$} myComponent_1t1r

There are several possibilities. The first is that GDS files don't have a natural "top level" so magic won't display the cell until you load it with the "load" command. If you are seeing no layout at all, that might be the reason.

... or wrong tech file

Wrong tech file would be immediately apparent in the inability to recognize the layer:purpose pairs.

yeah . the load command needed to be issued it seems . Thanks

Use, for example, the commands

see no *

and

see reram

or

see reram,via2

. Also, make sure you expand subcells by issuing the command

expand

. Also, use

magic -d XR

to get better graphics than the crappy X11 stipple patterns.