# Errors during a DPU software installation on PYNQ

**URL:** <https://discuss.pynq.io/t/errors-during-a-dpu-software-installation-on-pynq/1636>\
**Category:** Support\
**Created:** [August 13, 2020, 1:48pm UTC](https://discuss.pynq.io/t/errors-during-a-dpu-software-installation-on-pynq/1636 "2020-08-13T13:48:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pawzap](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/pawzap/32/1715_2.png) [@pawzap](https://discuss.pynq.io/u/pawzap)\
**Post date:** [August 13, 2020, 1:48pm UTC](https://discuss.pynq.io/t/errors-during-a-dpu-software-installation-on-pynq/1636/1 "2020-08-13T13:48:08Z")

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Hi!

I have some problems in the installation of DPU-PYNQ and pynq-dpu.  
When I run sudo make from DPU-PYNQ/scripts then I get:

xilinx@pynq:~/jupyter\_notebooks/DPU-PYNQ/upgrade$ sudo make  
bash ./check\_env.sh  
upgrading xrt …  
++ pwd

- CURDIR=/home/xilinx/jupyter\_notebooks/DPU-PYNQ/upgrade/xrt
- git clone [GitHub - Xilinx/XRT: Xilinx Run Time for FPGA](https://github.com/Xilinx/XRT.git) xrt-git  
Cloning into ‘xrt-git’…  
remote: Enumerating objects: 267, done.  
remote: Counting objects: 100% (267/267), done.  
remote: Compressing objects: 100% (215/215), done.  
remote: Total 53511 (delta 81), reused 155 (delta 48), pack-reused 53244  
Receiving objects: 100% (53511/53511), 65.23 MiB | 3.20 MiB/s, done.  
Resolving deltas: 100% (41854/41854), done.  
Checking out files: 100% (1820/1820), done.
- cd xrt-git
- git checkout -b temp tags/2019.2\_RC2  
Checking out files: 100% (1690/1690), done.  
Switched to a new branch ‘temp’
- cp -rf …/0001-fix-for-pynq.patch .
- git apply 0001-fix-for-pynq.patch
- cd /
- sudo tar xvzf kernel.tgz  
tar (child): kernel.tgz: Cannot open: No such file or directory  
tar (child): Error is not recoverable: exiting now  
tar: Child returned status 2  
tar: Error is not recoverable: exiting now  
Makefile:15: recipe for target ‘xrt’ failed  
make: \*\*\* [xrt] Error 2

How should I get a kernel.tgz file?

When I skipped the step and I have tried to install pynq-dpu I have got another error:

xilinx@pynq:~/jupyter\_notebooks/DPU-PYNQ/upgrade$ pip3 install pynq-dpu  
Collecting pynq-dpu  
Using cached [https://files.pythonhosted.org/packages/28/2a/f8093f377345d9ceca5b89274e19981c46a4ea7a30ea482dfe131edb35f1/pynq\_dpu-1.1.2.tar.gz](https://files.pythonhosted.org/packages/28/2a/f8093f377345d9ceca5b89274e19981c46a4ea7a30ea482dfe131edb35f1/pynq_dpu-1.1.2.tar.gz)  
Complete output from command python setup.py egg\_info:  
Exception ignored in: \<bound method Xlnk. **del** of \<pynq.xlnk.Xlnk object at 0x7fa1116860\>\>  
Traceback (most recent call last):  
File “/usr/local/lib/python3.6/dist-packages/pynq/xlnk.py”, line 150, in **del**  
for key in self.bufmap.keys():  
AttributeError: ‘Xlnk’ object has no attribute ‘bufmap’  
Traceback (most recent call last):  
File “”, line 1, in   
File “/tmp/pip-build-yk\_xwyqq/pynq-dpu/setup.py”, line 256, in   
cmdclass={“build\_py”: build\_py,  
NameError: name ‘build\_py’ is not defined

```
----------------------------------------

```

Command “python setup.py egg\_info” failed with error code 1 in /tmp/pip-build-yk\_xwyqq/pynq-dpu/

I installed build\_py package, but it did not solve the problem. How should I fill all requirements?  
I have a custom board based on ZynqMP and generic PYNQ v2.5 image for aarch64 architecture.

Thanks for any reply  
Paweł

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<div class="post-metadata">

**Author:** ![rock](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/rock/32/32_2.png) [@rock](https://discuss.pynq.io/u/rock)\
**Post date:** [August 17, 2020, 4:56pm UTC](https://discuss.pynq.io/t/errors-during-a-dpu-software-installation-on-pynq/1636/2 "2020-08-17T16:56:27Z")

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If it is image v2.5, you should have that file in your rootfs. However, that file is not necessary since it is tarring a symbolic link. Check if you have the path `/usr/src/kernel` on your rootfs; if so, you are good to remove:

[https://github.com/Xilinx/DPU-PYNQ/blob/master/upgrade/xrt/install.sh#L16](https://github.com/Xilinx/DPU-PYNQ/blob/master/upgrade/xrt/install.sh#L16)

And proceed with the upgrade process.

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<div class="post-metadata">

**Author:** ![pawzap](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/pawzap/32/1715_2.png) [@pawzap](https://discuss.pynq.io/u/pawzap)\
**Post date:** [August 18, 2020, 10:42am UTC](https://discuss.pynq.io/t/errors-during-a-dpu-software-installation-on-pynq/1636/3 "2020-08-18T10:42:52Z")

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Hi @rock!  
I have the generic image bionic.aarch64.2.5.img. It does not contain any kernel.tgz file. The /user/src/kernel is also not available in the image. This is the reason why the script fails.

I checked a pre-built image for ZCU104 and there the files are present. With the filesystem the script works correctly.

Paweł