Bug when loading multiple variables by name

> mask_path <- '/esnas/autosubmit/con_files/mask.regions.Ec3.0_O1L46.nc'
> lonlat <- Start(repos = mask_path,
+                 var = c('nav_lon', 'nav_lat'), 
+                 t = 'first',
+                 z = 'first', 
+                 x = 'all', 
+                 y = 'all', 
+                 return_vars = list(var_names = NULL), 
+                 var_var = 'var_names')
* Exploring files... This will take a variable amount of time depending
*   on the issued request and the performance of the file server...
Error in selector_checker(sub_array_of_selectors, sub_array_of_values,  : 
  Selectors do not match values in 'var'.
In addition: Warning messages:
1: ! Warning: Parameter 'pattern_dims' not specified. Taking the first dimension,
!   'repos' as 'pattern_dims'. 
2: ! Warning: Taking the first pattern dim, 'repos', as dimension with pattern
!   specifications (to be fetched in configuration file).