The glacier RGI60-12.01262, is a part of the rgi_leclercq_links_2014_RGIV6.csv link list, but it's LID (529) appears to not be included in the Glacier_Lengths_Leclercq.nc file. However the glacier seems to be included in the Leclercq et al. (2014) dataset. So I guess it got accidentally lost when creating the Glacier_Lengths_Leclercq.nc file.