[mapguide-users] selectAggregate error

[Nandorov]

hello,
i need some help. Do you know why i get the following error in this line?

$dataReader = $featureService->SelectAggregate($resId,
$layer->GetFeatureClassName(), $aggregateOptions);

where, $aggregateOptions is
$aggregateOptions->AddFeatureProperty($this->args['PROPERTYNAME']);
$aggregateOptions->SelectDistinct(true);

Index is out of range. Exception occurred in method GetItem at line 81 in
file
d:\buildforgeprojects\carrera_nightly\build_32.2\ent\os\common\foundation\System/DisposableCollection.cpp 
Index is out of range.
- MgFeatureServiceHandler.ProcessOperation line 83 file
d:\buildforgeprojects\carrera_nightly\build_32.2\ent\os\server\src\services\feature\FeatureServiceHandler.cpp
- MgOpSelectFeaturesSpatial.Execute line 110 file
d:\buildforgeprojects\carrera_nightly\build_32.2\ent\os\server\src\services\feature\OpSelectFeaturesSpatial.cpp
- MgServerSelectFeatures.SelectFeatures line 249 file
d:\buildforgeprojects\carrera_nightly\build_32.2\ent\os\server\src\services\feature\ServerSelectFeatures.cpp
- GetItem line 81 file
d:\buildforgeprojects\carrera_nightly\build_32.2\ent\os\common\foundation\System/DisposableCollection.cpp 

thanks ;)

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