coordinates issue for query_cross_id/query_cross_id_async

I tried to use the query_cross_id_async from the astroquery.vsa package to query the VIKING database. According to the documentation, the coordinates argument in query_cross_id_async should be "an array of one or more astropy SkyCoord objects specifying the objects to crossmatch against" (as an example, coordinates=[SkyCoord(117, -25, unit='deg')]). However, this return "TypeError: Argument cannot be parsed as a coordinate". [error coming from /astroquery/wfau/core.pyc in _args_to_payload(self, *args, **kwargs); C = commons.parse_coordinates(args[0]).transform_to(coord.ICRS))]

If indeed I used as input a SkyCoord object instead of an array (coordinates=SkyCoord(117, -25, unit='deg')), this raise an other error but later in the code "TypeError: Scalar 'SkyCoord' object has no len()".

So what should be used as coordinates input?

Reproduce the documented query_cross_id_async examples in astroquery.vsa, comparing an array of SkyCoord objects with a scalar SkyCoord. Trace the coordinate handling through wfau/core.pyc _args_to_payload and commons.parse_coordinates; done means the accepted input form is documented or corrected and the VIKING query completes without either TypeError.

Written by the indexing model from the issue text.