# Can't write bitstream to ZCU216 using qpsk\_overlay()

**URL:** <https://discuss.pynq.io/t/cant-write-bitstream-to-zcu216-using-qpsk-overlay/7045>\
**Category:** Support\
**Created:** [May 23, 2024, 6:39am UTC](https://discuss.pynq.io/t/cant-write-bitstream-to-zcu216-using-qpsk-overlay/7045 "2024-05-23T06:39:17Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![H.W](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@H.W](https://discuss.pynq.io/u/H.W)\
**Post date:** [August 13, 2024, 2:48pm UTC](https://discuss.pynq.io/t/cant-write-bitstream-to-zcu216-using-qpsk-overlay/7045/7 "2024-08-13T14:48:32Z")

</div>

Hi,  
zcu216 was not officially supported by PYNQ program, since there are no official firmware available. You can build your own [image](https://github.com/sarafs1926/ZCU216-PYNQ) by using PetaLinux. However, there are **bugs** in this firmware.The problem I encountered was that the partial bitstream could not be loaded. I solved my problem by using Method Overriding. You can check my solution [here](https://discuss.pynq.io/t/valueerror-embedded-null-byte-while-implementing-dpr-on-zcu216/7164). I think you are meeting the same problem as I did.

BR

---

_[View the full topic](https://discuss.pynq.io/t/cant-write-bitstream-to-zcu216-using-qpsk-overlay/7045)._