Problem with fosphor sink in GNUradio companion for Windows

[alexlitv277]

Hi ALL!
I have a problem with the fosphor sink in the GNUradio companion in latest version for the Windows 3.10.6.0 :

File "F:\grc\companion382\top_block.py", line 14, in
from gnuradio import fosphor
File "C:\Users\litv\AppData\Local\radioconda\lib\site-packages\gnuradio\fosphor_init_.py", line 9, in
from .fosphor_python import *
ImportError: DLL load failed while importing fosphor_python:

Last working version with the fosphor sink for windows in my case was 3.8.2 with nonconda installer.

See my details :
conda info --all

 active environment : base
active env location : C:\Users\litv\AppData\Local\radioconda
        shell level : 1
   user config file : C:\Users\litv\.condarc

populated config files : C:\Users\litv\AppData\Local\radioconda.condarc
C:\Users\litv.condarc
conda version : 23.3.1
conda-build version : not installed
python version : 3.10.10.final.0
virtual packages : __archspec=1=x86_64
__cuda=11.4=0
__win=0=0
base environment : C:\Users\litv\AppData\Local\radioconda (writable)
conda av data dir : C:\Users\litv\AppData\Local\radioconda\etc\conda
conda av metadata url : None
channel URLs : https://conda.anaconda.org/conda-forge/win-64
https://conda.anaconda.org/conda-forge/noarch
https://conda.anaconda.org/ryanvolz/win-64
https://conda.anaconda.org/ryanvolz/noarch
package cache : C:\Users\litv\AppData\Local\radioconda\pkgs
C:\Users\litv.conda\pkgs
C:\Users\litv\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\litv\AppData\Local\radioconda\envs
C:\Users\litv.conda\envs
C:\Users\litv\AppData\Local\conda\conda\envs
platform : win-64
user-agent : conda/23.3.1 requests/2.28.2 CPython/3.10.10 Windows/10 Windows/10.0.19044
administrator : True
netrc file : None
offline mode : False

conda environments:

base * C:\Users\litv\AppData\Local\radioconda

sys.version: 3.10.10 | packaged by conda-forge | (mai..
sys.prefix: C:\Users\litv\AppData\Local\radioconda
sys.executable: C:\Users\litv\AppData\Local\radioconda\python.exe
conda location: C:\Users\litv\AppData\Local\radioconda\lib\site-packages\conda
conda-build: None
conda-env: C:\Users\litv\AppData\Local\radioconda\Scripts\conda-env.exe
user site dirs:

CIO_TEST:
CONDA_DEFAULT_ENV: base
CONDA_EXE: C:\Users\litv\AppData\Local\radioconda\condabin..\Scripts\conda.exe
CONDA_EXES: "C:\Users\litv\AppData\Local\radioconda\condabin..\Scripts\conda.exe"
CONDA_PREFIX: C:\Users\litv\AppData\Local\radioconda
CONDA_PROMPT_MODIFIER: (base)
CONDA_PYTHON_EXE: C:\Users\litv\AppData\Local\radioconda\python.exe
CONDA_ROOT: C:\Users\litv\AppData\Local\radioconda
CONDA_SHLVL: 1
CURL_CA_BUNDLE:
HOMEPATH: \Users\litv
HTTPS_PROXY:
HTTP_PROXY:
LD_PRELOAD:
PATH: C:\Users\litv\AppData\Local\radioconda;C:\Users\litv\AppData\Local\radioconda\Library\mingw-w64\bin;C:\Users\litv\AppData\Local\radioconda\Library\usr\bin;C:\Users\litv\AppData\Local\radioconda\Library\bin;C:\Users\litv\AppData\Local\radioconda\Scripts;C:\Users\litv\AppData\Local\radioconda\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\MATLAB\R2022b\runtime\win64;C:\MATLAB\R2022b\bin;C:\MATLAB\R2022a\runtime\win64;C:\MATLAB\R2022a\bin;d:\MATLAB\R2013b\runtime\win64;d:\MATLAB\R2013b\bin;d:\Program Files\Microsoft VS Code\bin;d:\Program Files\UHD\bin;C:\Program Files\bladeRF\x64;C:\Users\litv\radioconda\condabin;C:\Users\litv\AppData\Local\Microsoft\WindowsApps;.
PSMODULEPATH: C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules
PTPATH: C:\Users\litv\AppData\Local\ProjectTree
REQUESTS_CA_BUNDLE:
SSL_CERT_FILE:
VBOX_MSI_INSTALL_PATH: C:\Program Files\Oracle\VirtualBox\

I will glad to any ideas to use fosphor with conda installation.

Best Regards
Alexander

[ryanvolz]

Hmm, I just tried this latest package in my Windows VM and it worked fine for me, so nothing has changed there.

File "F:\grc\companion382\top_block.py", line 14, in
from gnuradio import fosphor
File "C:\Users\litv\AppData\Local\radioconda\lib\site-packages\gnuradio\fosphor__init__.py", line 9, in
from .fosphor_python import *
ImportError: DLL load failed while importing fosphor_python:

We need to figure out what DLL is failing to load and why. Can you try navigating to C:\Users\litv\AppData\Local\radioconda\lib\site-packages\gnuradio\fosphor and running python -c "import fosphor_python"?

[alexlitv277]

Hi Ryan! Thank you for your job.
I repeated the installation on three Windows computers and got the same bad results with fosphor sink as described already in the question.

For example, for your check:

C:\radioconda\Lib\site-packages\gnuradio\fosphor>python -c "import fosphor_python"
Traceback (most recent call last):
File "", line 1, in
ImportError: DLL load failed while importing fosphor_python:

But on the fourth computer it suddenly worked (the only difference is - it has a video card not Nvidia but Intel) and I can see
lovely real-time spectrum.
I have no ideas , from one distributive - different situations.

Best Regards
Alexander

[ryanvolz]

Nvidia vs Intel being a difference is interesting and definitely something to dig into. We're using khronos-opencl-icd-loader on Windows, and this issue and this discussion might describe what's happening. It's possible that the Nvidia ICD loader has higher priority on your path, so it gets used instead, and then it fails because gnuradio-fosphor was not compiled against that. You can test this by seeing if you have an OpenCL.dll somewhere in C:\System32 and then temporarily renaming it.

[ryanvolz]

Also I want to note the similarity to #58 just so GitHub will show links between the two issues.

[shinchik17]

Hi, guys! I finally found the solution of this problem during long digging into. The problem is absence of two dlls:
ucrtbased.dll and vcruntime140d.dll in System32 folder. These components are part of Microsoft Visual Studio, that's why developers such as @ryanvolz haven't this trouble at all. After adding this libraries to System32 a fosphor sink works fine. I use GR 3.10.7 and Windows 10

[Biran1911]

Hi, guys! I finally found the solution of this problem during long digging into. The problem is absence of two dlls: ucrtbased.dll and vcruntime140d.dll in System32 folder. These components are part of Microsoft Visual Studio, that's why developers such as @ryanvolz haven't this trouble at all. After adding this libraries to System32 a fosphor sink works fine. I use GR 3.10.7 and Windows 10

I am having the exact issue.
would you kindly describe to process? I tried to install Microsoft visual studio 2013, 2015-2022.
in my system32 i see the following files:
ucrtbase.dll and vcruntime140.dll

[shinchik17]

I am having the exact issue. would you kindly describe to process? I tried to install Microsoft visual studio 2013, 2015-2022. in my system32 i see the following files: ucrtbase.dll and vcruntime140.dll

Check names of dlls I wrote and yours. Mine have letter "D" at the end. It's a differrent dlls. Firstly check if you have these dlls with "D" in your System32 folder.

[Biran1911]

I am having the exact issue. would you kindly describe to process? I tried to install Microsoft visual studio 2013, 2015-2022. in my system32 i see the following files: ucrtbase.dll and vcruntime140.dll

Check names of dlls I wrote and yours. Mine have letter "D" at the end. It's a differrent dlls. Firstly check if you have these dlls with "D" in your System32 folder.

I understand what you wrote, i dont got the debug version of those dll's.
Im simply asking you how did you obtain yours? for example is there any file to download?
Thanks :)

[shinchik17]

I understand what you wrote, i dont got the debug version of those dll's. Im simply asking you how did you obtain yours? for example is there any file to download? Thanks :)

I got you :) Try these ones
gr310dll.zip

[Biran1911]

I understand what you wrote, i dont got the debug version of those dll's. Im simply asking you how did you obtain yours? for example is there any file to download? Thanks :)

I got you :) Try these ones gr310dll.zip

Thank you so much :)

[ryanvolz]

Nice digging @shinchik17! Question to both you and @Biran1911: are you using an Nvidia graphics card like @alexlitv277, or something else like Intel or AMD?

If either of you is seeing this without an Nvidia card and its OpenCL ICD loader software, then that points to a different issue than those linked in #63 (comment) and potentially something I can get fixed while still waiting on resolution there.

If you're both using Nvidia, that's still very useful to know. The workaround is very helpful regardless. Thanks!

[shinchik17]

Nice digging @shinchik17! Question to both you and @Biran1911: are you using an Nvidia graphics card like @alexlitv277, or something else like Intel or AMD?

If either of you is seeing this without an Nvidia card and its OpenCL ICD loader software, then that points to a different issue than those linked in #63 (comment) and potentially something I can get fixed while still waiting on resolution there.

If you're both using Nvidia, that's still very useful to know. The workaround is very helpful regardless. Thanks!

I've also tried on the second PC with AMD Radeon integrated graphics. The issue with fosphor is the same. The solution is also the same - adding 2 dlls works.