Hi i setup caravel for analog project but when i open mag file in magic then it show nothing due to the tech file missing but there is $pdk (i guess it is global variable ) when i change it with sky130A it works. do this the way of doing or i miss something (i already set the PDK_ROOT=(my pdk dir path pdk=sky130A) and how i merge gds file of layout with empty wrapper of caravel file in magic . i attached the ss of the console and mag file header thank you @Mitch Bailey @Tim Edwards

I am mystified how the technology got set to

$PDK

in the .mag file. Seems like it must have been a manual edit to the file.

thank you for reply @Tim Edwards believe me i do nothing i just clone the repo from git hub using the link : https://github.com/efabless/caravel_user_project_analog using Command: git clone -b mpw-7a https://github.com/efabless/caravel_user_project_analog i attached the ss of the github file caravel_user_project_analog/mag/user_analog_project_wrapper.mag thank you

@Ashutosh Kumar: I am still mystified, but it's not your fault. It's definitely in the repository.

OK! thank you for clarification shall i go with sky130A for time being ? @Tim Edwards

I think it should be sufficient to hand-edit the .mag files and replace

$PDK

with

sky130B

. I have posted an issue on the github tracker for

caravel_user_project_analog

and I hope it will be taken care of immediately. My suspicion is that somebody wanted a way to make the magic files indpendent of the technology but chose to implement their own method that breaks all the tools rather than just use the existing

load -force

command which is intended to deal with such situations.

thank you so much @Tim Edwards i will again pull the repo could help me in understanding of the difference between sky130B and sky130A thank you

Sky130B includes support for ReRAM. It is the process variant being used now for the open MPW runs.

thank you @Tim Edwards for this information but we are doing our project in the Pico Chipathon is there any issue if we use sky130A @Boris Murmann thank you

The Chipathon run is Sky130A.

Sorry, my mistake---I am not always aware of who is on a ChipIgnite run. Yes, for the Chipathon chips the PDK should be set to

sky130A

.

thank you so much for clarification @Boris Murmann and @Tim Edwards