@Tim Edwards @Mitch Bailey I had magic version 8.3.365. It could extract RC spice file successfully form the gds. But when I upgraded magic from 8.3.365 to 8.3.414, the generated file includes only C and does not contain any R. How can I fix it please? , should i use different steps? Thanks I usually use the following steps:- gds read <> select top cell flatten <> load <> extract do local extract all ext2sim labels on ext2sim extresist tolerance 10 extresist ext2spice lvs ext2spice cthresh 0 ext2spice extresist on ext2spice