Apologies, that was a typo, correct path is
/g/data/ol01/outputs/access-om3-25km/Antarctic_slope_contours/Antarctic_slope_contour_1000m_OM3_25km.nc
The other file you mention is accessible at /g/data/ik11/grids/Antarctic_slope_contour_1000m.npz.
Apologies, that was a typo, correct path is
/g/data/ol01/outputs/access-om3-25km/Antarctic_slope_contours/Antarctic_slope_contour_1000m_OM3_25km.nc
The other file you mention is accessible at /g/data/ik11/grids/Antarctic_slope_contour_1000m.npz.