I have noticed an error message in my magic drc log which sa

Question

I have noticed an error message in my magic drc log which says `Cell sky130 fd sc hd o22a 4 couldn t be read` `DEF read Line 159 Error Cell sky130 fd sc hd o22a 4 is not defined Maybe you have not read the corresponding LEF file ` `Cell sky130 fd sc hd a2bb2o 4 couldn t be read` `DEF read Line 160 Error Cell sky130 fd sc hd a2bb2o 4 is not defined Maybe you have not read the corresponding LEF file ` `Cell sky130 fd sc hd xor2 4 couldn t be read` `DEF read Line 161 Error Cell sky130 fd sc hd xor2 4 is not defined Maybe you have not read the corresponding LEF file ` `Cell sky130 fd sc hd inv 8 couldn t be read` `DEF read Line 162 Error Cell sky130 fd sc hd inv 8 is not defined Maybe you have not read the corresponding LEF file ` `Cell sky130 fd sc hd inv 8 couldn t be read` `DEF read Line 163 Error Cell sky130 fd sc hd inv 8 is not defined Maybe you have not read the corresponding LEF file ` `Cell sky130 fd sc hd and2 4 couldn t be read` `DEF read Line 164 Error Cell sky130 fd sc hd and2 4 is not defined Maybe you have not read the corresponding LEF file ` And the list goes on Which LEF is it referring to The `merged lef` has these cells included in it I get the same message when I ran `spm` design as well

Wajeh ul hasan · Answer

< Amr Gouhar>

Wajeh ul hasan · Answer

So I was looking at the `scripts magic drc tcl` The scripts reads `lef read $ env TECH LEF ` ` load $ env magic result file tag mag` `if info exist env EXTRA LEFS ` `set lefs in $ env EXTRA LEFS ` `foreach lef file $lefs in ` `lef read $lef file` ` ` Now the lef file it is reading is `techlef sky130 fd sc hd tlef` which does not contain information of the cells Rather it is `lef sky130 fd sc hd lef` which contaiins the cell information Is that the reason of the error

Amr Gouhar · Answer

< Wajeh ul hasan> you don t need the lef because the magicrc contains pointers to the maglef of each cell So if the setup is correct everything should be fine