error when consuming a webservice made in .NET

I get this error when wanting to visualize the data of a webservice made in .NET, where CODIGOPRODUCTO is a parameter of the webservice.

  

Notice: Undefined property: stdClass :: $ CODEPRODUCT

This is my code:

$getproducts = file_get_contents('http://x.x.x.111/webservice.svc/getproducts');
$json = json_decode($getproducts);
$codigo = utf8_decode($json->{'CODIGOPRODUCTO'});
print_r ($codigo);