ModuleNotFoundError: No module named 'topsStack'

[Geo-Rser]

There was an error when i complete the installation of ISCE2.6.3 with the cuda-12.1.
it cannot run the stackSentinel.py, the error information is:
Traceback (most recent call last):
File "/home/ys/isce2/contrib/stack/topsStack/stackSentinel.py", line 17, in
from topsStack.Stack import config, run, sentinelSLC
ModuleNotFoundError: No module named 'topsStack'

[saoussenIris]

hi, I had the same issue and fixed it by changing the line ,in stackSentinel.py, :
"from topsStack.Stack import config, run, sentinelSLC" to
"from Stack import config, run, sentinelSLC"

[yunjunz]

This is a change introduced in the stack processor. You need to set up the $PYTHONPATH as well now, in addition to the $PATH, since version 2.6.2, as described here: https://github.com/isce-framework/isce2/blob/main/contrib/stack/README.md#2-setup-paths-for-stack-processors.

[Carolinah23]

Hello, I was having the same issue.

I added the path to the PATH variable (vi ~/.bashrc, then write export PATH="/home/...path.../contrib/stack/topsStack:${PATH}").
I have done this on Ubuntu 20.04 and works fine, however, in Ubuntu 22.04 it didn't.
In Ubuntu 22.04 I applied the solution that @saoussenIris proposed and it worked (stackSentinel.py -h works fine).

I rewrote "from topsStack.Stack import config, run, sentinelSLC" in stackSentinel.py to follow the instructions given by the ISCE team. I modified PYTHONPATH (vi ~/.bashrc, then write export PYTHONPATH="/home/...path.../contrib/stack/topsStack:${PYTHONPATH}"and removed export PATH="/home/...path.../contrib/stack/topsStack:${PATH}"). In this case, stackSentinel.py -h gives me this error (stackSentinel.py: command not found).

I am wondering if this is related to the OS version or if I am modifying PYTHONPATH incorrectly @yunjunz ?

[yunjunz]

It should be as below. Note that there is no "topsStack" in the PYTHONPATH setup.

export PYTHONPATH="${PYTHONPATH}:/home/...path.../contrib/stack"
export PATH="${PATH}:/home/...path.../contrib/stack/topsStack"