Getting Errror cannot be converted to esriGeometryPolygon

Hi @asadamjad​ 

The reason that you are experiencing the errors is due to the fact that ArcGIS Portal Writer does not handle Aggregates geometry, as the FeatureService needs to be only a single geometry feature see documentation here

If you look under Geometry Type Aggregate.

To be clear, FME can only support Homogeneous aggregates so any input features with fme_aggregate  can’t have fme_collection as a fme_type.

WORKAROUND:

The workaround is to convert those geometries into Homogenous aggregate using Deaggregator and Aggregator (in succession). See the sample workspace attached.