# Question: crs download link

**URL:** <https://forum.aztec.network/t/question-crs-download-link/532>\
**Category:** Noir\
**Tags:** noir\
**Created:** [June 1, 2023, 8:22am UTC](https://forum.aztec.network/t/question-crs-download-link/532 "2023-06-01T08:22:17Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ethan-000](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/ethan-000/32/123_2.png) [@Ethan-000](https://forum.aztec.network/u/Ethan-000)\
**Post date:** [June 1, 2023, 8:22am UTC](https://forum.aztec.network/t/question-crs-download-link/532/1 "2023-06-01T08:22:17Z")

</div>

Moving this question from discord:

hey. I’m wondering if theres anything different between these two. only the right one (old link) seems to be working for me 🫠

 ![crs_link_change](https://europe1.discourse-cdn.com/flex013/uploads/aztec/original/1X/8da486950883b6246d2ed45cd59631e7d1bc3634.png)

this was modified in this pr [https://github.com/noir-lang/acvm-backend-barretenberg/pull/84](https://github.com/noir-lang/acvm-backend-barretenberg/pull/84)

---

<div class="post-metadata">

**Author:** ![vezenovm](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/vezenovm/32/163_2.png) [@vezenovm](https://forum.aztec.network/u/vezenovm)\
**Post date:** [June 1, 2023, 2:32pm UTC](https://forum.aztec.network/t/question-crs-download-link/532/2 "2023-06-01T14:32:50Z")

</div>

Are you able to use the link using curl? What is the failure you are getting?

---

<div class="post-metadata">

**Author:** ![Ethan-000](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/ethan-000/32/123_2.png) [@Ethan-000](https://forum.aztec.network/u/Ethan-000)\
**Post date:** [June 1, 2023, 3:47pm UTC](https://forum.aztec.network/t/question-crs-download-link/532/3 "2023-06-01T15:47:06Z")

</div>

i wasn’t able to use it for halo2 parameters. if i use the new link, verification wouldn’t work. shouldn’t be a big problem. i’m just curious whats the difference between these two and whether the old link is deprecated or something. If its not deprecated it should be fine

---

<div class="post-metadata">

**Author:** ![vezenovm](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/vezenovm/32/163_2.png) [@vezenovm](https://forum.aztec.network/u/vezenovm)\
**Post date:** [June 1, 2023, 4:54pm UTC](https://forum.aztec.network/t/question-crs-download-link/532/4 "2023-06-01T16:54:24Z")

</div>

Can you link the repo you are working out of?

---

<div class="post-metadata">

**Author:** ![Ethan-000](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/ethan-000/32/123_2.png) [@Ethan-000](https://forum.aztec.network/u/Ethan-000)\
**Post date:** [June 1, 2023, 5:22pm UTC](https://forum.aztec.network/t/question-crs-download-link/532/5 "2023-06-01T17:22:07Z")

</div>

here [GitHub - Ethan-000/halo2\_backend](https://github.com/Ethan-000/halo2_backend)