I am getting an error MissingGridDefinitionPathError

It is possible that, when trying to access data on FDB, you get the following error:

MissingGridDefinitionPathError: Environment variable `GRID_DEFINITION_PATH` is not set.
This variable must point to the location of grid-defining netCDF files.
Without this path Unstructured Grids cannot be decoded.

The GSV package that AQUA uses to access the data on FDB requires the environment variable GRID_DEFINITION_PATH to be set. This variable must point to the location of grid-defining netCDF files.

To solve this issue, you can set the environment variable GRID_DEFINITION_PATH to the location of the grid-defining netCDF files. On Lumi and Levante (and possible other HPCs supported on DestinE-Climate-DT) you can rely on shared grid definition files that are already available on the system. Please refer to the corresponding installation guidelines for more information: HPC Installation or Installation on Levante HPC at DKRZ.