AttributeError: /lib/x86_64-linux-gnu/libiio.so.1: undefined symbol: iio_get_backends_count

Hi,

Please check your libiio version using iio_info -V
You should use v0.25. If the installed version is v1.0 then you should uninstall it and install the v0.25 release.

Thank you!
-Alexandra

Hi Alexandra,

my libiio version is v0.25

Thanks,

DOngyu

Hi,

From the error above it looks like there might be some files left behind from a previous libiio v1.0 install.

AttributeError: /lib/x86_64-linux-gnu/libiio.so.1: undefined symbol: iio_get_backends_count

Hi Alexabdra,

When I import iio, there is an error:

pci@pci-virtual-machine:~/gr-dymod/build$ python3
Python 3.8.10 (default, Nov 22 2023, 10:22:35)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import iio
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/pci/.local/lib/python3.8/site-packages/iio.py", line 229, in <module>
    _get_backends_count = _lib.iio_get_backends_count
  File "/usr/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/x86_64-linux-gnu/libiio.so.1: undefined symbol: iio_get_backends_count

but when I try to re-install the packages, it shows that I already installed them:

What should I do? I do installed the libiio v1.0 before and then I re-install the v0.25. How can I remove the v1.0? Is it not overwritten? 

Thanks,

Dongyu

Hi,

You should try to run pip uninstall on both pylibiio and pyadi-iio. Then try to run the following python command again: import iio; print(iio.version).
If everything is properly uninstalled. then it should print that no such module is available. If you still get an error, then you need to manually remove anything related to libiio python bindings from /home/pci/.local/lib/python3.8/site-packages .

Also go to :  /lib/x86_64-linux-gnu and remove libiio.so.1. It was not properly overwritten because the libraries have 2 different versions and you just replaced a part of the entire project when you reinstalled 0.25.

After everything is clean reinstall pylibiio and pyadi-iio using pip.

-Alexandra

hey, i have the same issue. Tried everything you said in this thread and still getting the error:
>>> import adi
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/user/new_sdr_project/lib/python3.10/site-packages/adi/__init__.py", line 5, in <module>
    from adi.ad469x import ad469x
  File "/home/user/new_sdr_project/lib/python3.10/site-packages/adi/ad469x.py", line 10, in <module>
    from adi.context_manager import context_manager
  File "/home/user/new_sdr_project/lib/python3.10/site-packages/adi/context_manager.py", line 5, in <module>
    import iio
  File "/home/user/new_sdr_project/lib/python3.10/site-packages/iio.py", line 227, in <module>
    _lib = _cdll(find_library(_iiolib), use_errno=True, use_last_error=True)
  File "/usr/lib/python3.10/ctypes/__init__.py", line 374, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: libiio.so.1: cannot open shared object file: No such file or directory

i am running on jetson orin nano and ubuntu 22.04
thanks, in advanced

ishayshalom did you install the libiio c library? First step of the doc here https://analogdevicesinc.github.io/pyadi-iio/guides/quick.html

-Travis