[postgis-users] Re: transform() does not do work for NGO1948 zone III-> WGS84 longlat (epsg:27393->epsg:4326)

[Patrick]

"Frank Warmerdam" <warmerdam at pobox.com> wrote in message 
news:931f8ea90512201356v75c57d08ub18b6827460ee16e at mail.gmail.com...
>
> Error -38 is:
>   "failed to load NAD27-83 correction file",  /* -38 */
>
> So basically, if the datum shift files are not found, then the
> code fallback to trying a conversion without the datum shift.

Frank,

Why would the error be thrown in the first place, seeing that we are going 
from NGO1948/Bessel to WGS84/WGS84? Where does the grid shift enter?

Patrick