# Newman and pfx problem

**URL:** <https://community.postman.com/t/newman-and-pfx-problem/42214>\
**Category:** Help Hub\
**Tags:** newman-project, client-certificate\
**Created:** [December 20, 2022, 8:39am UTC](https://community.postman.com/t/newman-and-pfx-problem/42214 "2022-12-20T08:39:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tungthitcho](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/tungthitcho/32/14242_2.png) [@tungthitcho](https://community.postman.com/u/tungthitcho)\
**Post date:** [December 20, 2022, 8:39am UTC](https://community.postman.com/t/newman-and-pfx-problem/42214/1 "2022-12-20T08:39:15Z")

</div>

Hi guys,

I’ve tried to run my collection through newman cli with p12 client certificate but no luck.  
I fire this command “newman run collection.json --ssl-client-cert-list certs.json” and  
Newman always return unsupported error.  
 ![image](https://us1.discourse-cdn.com/getpostman/original/3X/d/d/dd7598755dbdc14fc2572ac6ddd1f457d9b1c5ac.png)

After several times I tried to use postman-cli and it works well.  
But with postman-cli I cant customize my report so, can you guy help me this case? Thank you in advance