Hi while doing precheck i got error how to resolve it please help me @mehdi @Mitch Bailey thank you

Looks like you need to copy your schematic spice to

netgen/user_analog_project_wrapper.spice

Does your

gds/user_analog_project_wrapper.gds

contain

user_analog_project_wrapper

?

thank you so much for the reply @Mitch Bailey followed by me : 1.creating the a dummy_inv with some resistor (with required numbers of pins) schematic file using xschem 2. making its symbol 3. inserted these symbols in the analog_wrapper_tb.sch(delete por symbol and insert the dummy_inv symbol and connect the pins according to my requirement )4.making layout of dummy_inv in magic and (checked the drc and lvs) 5.open the user_analog_project_wrapper_empty.mag file in magic and place the dummy cell inside it and connect the pins according the schematic diagram 6.Generate the spice file and mag file using these commands (gds read user_analog_project_wrapper.gds load user_analog_project_wrapper extract all ext2spice lvs ext2spice -o user_analog_project_wrapper.spice) and save the gds file into the gds dir using Write GDS (in magic ) 7.placed the .spice file into the netgen then i run the precheck command i have doubt regarding the generating the .spice file from the schematic because some pins are not connected anywhere . is it ok If i miss any thing please help me @Mitch Bailey thank you

Can you post your

user_analog_project_wrapper.spice

from xschem and

user_analog_project_wrapper.gds

and the extracted spice file?

sure! thank you

How about the

user_analog_project_wrapper

from xschem?

sorry it is from the mag

When you netlist, be sure the

Simulation -> LVS netlist: top level is a .subckt

is checked.

i am really sorry i miss this point i corrected it and do the lvs check but i got the error no matching element ( may be due to resistor ) please help me @Mitch Bailey @mehdi @Tim Edwards Thank you

@Ashutosh Kumar: It appears that your schematic is using an ideal SPICE resistor and not a sky130 semiconductor resistor.

thank you so much for the reply @Tim Edwards i have check sky130 semiconductor resistor but i didn't find the sky130_fd_pr__res_generic_l1 should i use another one and replace at both place(schematic and layout ) thank you

No, you should use another one and change the name in the symbol instance (which is what makes xschem so easy to use!). e.g.,

res_generic_po.sym

is fine to use; the symbol properties contain the string used as the model name when writing SPICE, so you just need to change that text from

sky130_fd_pr__res_generic_po

to

sky130_fd_pr__res_generic_l1

.

thank you @Tim Edwards