# Ultra96v2 custom petalinux path

**URL:** <https://discuss.pynq.io/t/ultra96v2-custom-petalinux-path/3304>\
**Category:** Support\
**Created:** [November 15, 2021, 9:30am UTC](https://discuss.pynq.io/t/ultra96v2-custom-petalinux-path/3304 "2021-11-15T09:30:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Alexander\_El-Kady](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/alexander_el-kady/32/2341_2.png) [@Alexander\_El-Kady](https://discuss.pynq.io/u/Alexander_El-Kady)\
**Post date:** [November 15, 2021, 9:30am UTC](https://discuss.pynq.io/t/ultra96v2-custom-petalinux-path/3304/1 "2021-11-15T09:30:23Z")

</div>

I am struggling to get ultra96v2 working with pynq, further than juppyter-written examples. So I am using Vitis and implementing a simple vector-addition example, all using 2020.2 at the moment (was at 2020.1 and moved to bypass some errors on ultra96v2 base scripts from Avnet).

I have completed and tested the zcu104 flow, by creating a custom petalinux project, importing pynq overlay and python3 dependencies. Then moved to Vitis and implemented an HLS example of vector-addition. Test was passed and everything is fine, I can pass different values get different results using numpy and setItem .

When I move to Ultra96V2 and do the same flow, I get errors when loading the Overlay in python3.  
When I load the .xclbin I am facing “No hwh or tcl file found” (where zcu104 doesn’t need at all this file, probably is already loaded?? don’t know). Here is the error:

"  
_**Traceback (most recent call last):**_  
\*\*\* File “test2.py”, line 9, in \*\*\*  
\*\*\* ol = Overlay('/media/sd-[735.662140] [drm] Pid 1697 closed device\*\*\*  
_**mmcblk0p1/xsa\_files/krnl\_vadd.xclbin’)**_  
\*\*\* File “/usr/lib/python3.7/site-packages/pynq/overlay.py”, line 330, in **init** \*\*\*  
\*\*\* self.parser = self.device.get\_bitfile\_metadata(self.bitfile\_name)\*\*\*  
\*\*\* File “/usr/lib/python3.7/site-packages/pynq/pl\_server/device.py”, line 645, in get\_bitfile\_metadata\*\*\*  
\*\*\* bitfile\_name))\*\*\*  
_ **ValueError: Cannot find HWH or TCL file for /media/sd-mmcblk0p1/xsa\_files/krnl\_vadd.xclbin.** _  
"  
When I am trying to load the .bit file I am facing a header error reading on bit file.

I am using something similar to this [https://www.element14.com/community/groups/fpga-group/blog/2020/05/01/petalinux-git-howto](https://www.element14.com/community/groups/fpga-group/blog/2020/05/01/petalinux-git-howto) but for 2020.2 version of all git repositories.

So I am wondering , has anyone succeeded to run a kernel from Vitis using pynq and Ultra96v2? Because for me I think this is the end of trials…

Thanks already,  
Alexander