Parameters is an array: AGSGPParameterValue *parcel = [AGSGPParameterValue parameterWithName:@"Parcel_ID" type:AGSGPParameterTypeString value:@"1N1E34CC -06600"]; AGSGPParameterValue *distance = [AGSGPParameterValue parameterWithName:@"SearchDistance_ft" type:AGSGPParameterTypeLong value:[NSNumber numberWithInt:100]]; NSArray *params = [NSArray arrayWithObjects:parcel,distance,nil]; Please have a look http://help.arcgis.com/en/arcgismobile/10.0/apis/iOS/2.0/concepts/index.html#/Geoprocessor/00pw0000001m000000/
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