pypylon causing application segfault when a different version of pylon viewer is installed

[mahiuchun]

Describe what you want to implement and what the issue & the steps to reproduce it are:

pypylon (we use 1.8.0 from pip) does not need a pylon viewer installation to function.

However, we noticed that when pylon viewer (we use DEB package) is installed. The python program would end up loading shared libraries from /opt/pylon (we looked at process memory maps).

When the pypylon version and pylon viewer version are too far apart, our Python application would end up segfault or exhibit other instability.

Is there a way to achieve isolation between pypylon and system pylon viewer?

Is your camera operational in Basler pylon viewer on your platform

Yes

Hardware setup & camera model(s) used

x86-64 PC Ubuntu 20.04/22.04

acA2440-35uc USB3

Runtime information:

pypylon: 1.8.0 / 6.3.0.18933

[SMA2016a]

try to unset the environment variable PYLON_ROOT

[mahiuchun]

try to unset the environment variable PYLON_ROOT

Thanks for the response. Now I noticed that pylon DEB package contains /etc/profile.d/basler-gentl-path.sh and /etc/profile.d/basler-pylon-root.sh.

Un-setting GENICAM_GENTL64_PATH made the difference for me. Un-setting PYLON_ROOT had no effect