Ctios exited with unknown exit/exception code 80

Question

I'm seeing random disconnects for CTIOS service on one of my PG's.
From the CTIOS_nm:
 CTIOS1-nm Process ctios on ICM\xxxx\CTIOS1 went down for unknown reason. Exit code 0x80. It will be automatically restarted. 
1 CTIOS1-nm Trace: main: noticed process ctios handle 188 exited with unknown exit/exception code 80
MDS just shows this:
 Unexpected disconnect from client ctios1b.
  Last EMT Error [-519897069]: The remote process has exited.
 Client ctios1b registered with handle 166.
 Client ctios1b started. 
Nothing telling in the windows app logs either.

Answer 1

After further try and error, using the following alternative method of setting a dataset works:
CrystalDecisions.ReportAppServer.DataDefModel.ISCRDataSet crDataset = CrystalDecisions.ReportAppServer.DataSetConversion.DataSetConverter.Convert(m_XmlInfo.CustomDataSet);
report.ReportClientDocument.DatabaseController.SetDataSource(crDataset, string.Empty, string.Empty);