FAQ === Facing the "Too many open files" error -------------------------------------- iota2 may open a lot of files at the same time to complete a run. With some distribution configuration, the error ``Too many open files`` the solution is to increase the number of files that can be opened at the same time thanks to the command : .. code-block:: bash ulimit -u #inform you about the current limit (ie : 4096) ulimit -u 5000 # increase user limit to 5000 More information at : https://linuxhint.com/permanently_set_ulimit_value/ .. Note:: If your are using Sentinel-1 data, you have to fill the parameter :ref:`srtm ` which is the path that contains DEM files. If you are facing the ``Too many open files``, try to reduce the content of this directory as much as possible. Warning about parameters when the chain start --------------------------------------------- These warnings implies that the parameter is detected but not known by iota2. If you are not using a particular branch, ensure that your parameters are correct by looking at the corresponding builder: - :doc:`i2_classification ` - :doc:`i2_obia ` - :doc:`i2_vectorization ` - :doc:`i2_features_map ` If all parameters seem correct, that probably means that you are not using the latest iota2 version. Ensure that the ``.condarc`` file is correctly filled, and try to :doc:`re-install iota2 `. In last case, open a issue with the chain version, the ``.condarc`` contents and the warning message.