Install path with spaces causes problems

[ebrahimebrahim]

It seems to be meshroom related.

Either reproduce and fix the issue, or find a better way to warn users during installation that an path with spaces will cause problems.

[sadhana-r]

I was able to reproduce the error - photoscan Generation fails in both OpenLIFU 1.11.0 (Meshroom 2023) and 1.12.0 (Meshroom 2025).

Click here to expand error details

meshroom_batch: error: unrecognized arguments: 1.12.0-2026-04-20/lib/Python/Lib/site-packages/openlifu/nav/meshroom_pipelines/default_pipeline.mg
[Python] Exception raised in onStartPhotoscanGenerationButtonClicked: 
Traceback (most recent call last):
  File "C:\Users\sadhana.ravikumar\AppData\Local\Openwater\OpenLIFU 1.12.0-2026-04-20\lib\OpenLIFU-5.11\qt-scripted-modules\OpenLIFULib\util.py", line 56, in f_with_forwarded_errors
    raise e
  File "C:\Users\sadhana.ravikumar\AppData\Local\Openwater\OpenLIFU 1.12.0-2026-04-20\lib\OpenLIFU-5.11\qt-scripted-modules\OpenLIFULib\util.py", line 53, in f_with_forwarded_errors
    return f(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^
  File "C:/Users/sadhana.ravikumar/AppData/Local/Openwater/OpenLIFU 1.12.0-2026-04-20/bin/../lib/OpenLIFU-5.11/qt-scripted-modules/OpenLIFUTransducerLocalization.py", line 2523, in onStartPhotoscanGenerationButtonClicked
    photoscan_openlifu = self.logic.generate_photoscan(
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:/Users/sadhana.ravikumar/AppData/Local/Openwater/OpenLIFU 1.12.0-2026-04-20/bin/../lib/OpenLIFU-5.11/qt-scripted-modules/OpenLIFUTransducerLocalization.py", line 3310, in generate_photoscan
    photoscan_openlifu, data_dir = openlifu_lz().nav.photoscan.run_reconstruction(
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sadhana.ravikumar\AppData\Local\Openwater\OpenLIFU 1.12.0-2026-04-20\lib\Python\Lib\site-packages\openlifu\nav\photoscan.py", line 453, in run_reconstruction
    camera_init_path = next(cache_dir.glob("CameraInit/*/cameraInit.sfm"))
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
StopIteration

The error is caused by the --pipeline argument. The remaining directory arguments (input/output/save) are based on the temp directory which avoids whitespaces.

This seeems to be due to an issue in Meshroom (alicevision/Meshroom#3016 and alicevision/Meshroom#2838), and will be fixed in the next release.
As a workaround, one option to fix this issue is to copy the pipeline file from the installation directory to a temp directory that does not contain spaces.

[ebrahimebrahim]

(Moved this issue to OpenLIFU-python where the workaround can be implemented. This issue impacts both the extension and the custom app, but in principle it would impact users of the python library who are using the meshroom runner.)