GetSpatialContexts does not work

[glangen]

Does anybody know why the last line in this code snippet does not work?

$featureService = $siteConnection->CreateService(MgServiceType::FeatureService);
$featureSource = $layer->GetFeatureSourceId();
$theSC = $featureService->GetSpatialContexts($featureSource, true);

Thanks,
Gido

[dswilson]

What is your featureSource type in this case? It may be it's failing for a specific type.

Dave