public Task<ObservationRecord> NextObservationRecordAsync()Public Function NextObservationRecordAsync As Task(Of ObservationRecord)public:
Task<ObservationRecord^>^ NextObservationRecordAsync()function NextObservationRecordAsync();| InvalidOperationException | The PQDIF file is not open. - OR - PQDIF file has more than one container record. - OR - There are no more observation records in the PQDIF file. |
| InvalidDataException | Observation record found with no corresponding data source record. |
| EndOfStreamException | End of stream encountered while reading the next observation record. |