How correctly to convert datetime to timestamp

I have tried to use OLEDB connection (trial version for Greenplum) in SSIS package for copying table (MS SQL to Greenplum) operation, but I got error: "PostgreSQL Native Provider" Hresult: 0x80004005 Description: "ERROR: insufficient data left in message".
It is a big table not only because rows but columns (almost 100 columns). With good working varchar(s) and int(s) there are a lot of datetime(s) in source. Is it a problem? What can suggestions be made for this error?

It is important that GPLOAD option was used.