Troubleshooting

Common Issues

Conda fails to solve dependencies when installing

Ensure conda-forge has the highest channel priority, and channel priority is set to strict.

conda install --file conda_requirements.txt -c conda-forge

The `richdem` package won’t install or cannot be found when creating a static file

The richdem package is not available on PyPI for Python 3.11+. If you are using a pip venv, you will need to compile richdem yourself.

Consider using conda/mamba to install dependencies:

conda install richdem

COSIPY does not work on Windows

Windows is not currently supported. Consider installing Windows Subsystem for Linux.

Input data is out of range

Please check your settings in the utilities configuration for aws2cosipy and wrf2cosipy. By default, the in_K parameter is set to true.

Data in the output file do not match the input file

Some input variables are modified when loaded into COSIPY, e.g. negative values in incoming solar radiation are set to zero.

`interp_subT()` raises an IndexError

The glacier has melted away completely at a particular grid point. Consider increasing the initial glacier height.

Parameters set in the Slurm configuration file are not passed on to Slurm

Ensure parameters between your Slurm configuration file are identical to those in your sbatch script.

Developer Issues

Error when referencing Config.<X> or Constants.<X> inside an njitted function

Variables must be declared at the module level if you wish to use them in an njitted function:

from cosipy.config import Config
from cosipy.constants import Constants

foo = Config.foo  # declare at module level if used in an njitted function

@njit
def get_foo_njit(...):
    """Njitted functions cannot reference the imported parameters directly."""
    return foo

def get_foo_nopython(...):
    """Non-compiled functions can reference the parameters directly."""
    return Config.foo

Dask workers run out of memory when saving the output

This is a known issue. Consider selecting fewer output variables under [OUTPUT_VARIABLES] in config.toml.

Cannot set values of imported `Config` or `Constants` attributes

Parameters parsed from configuration files are read-only. Some users work around this by passing parameters as a dict argument into cosipy_core.