"The source column ""%s"" may contain some 8-byte unsigned integer values that cannot be represented as 18-digit signed decimal integers!"
Explanation:
This warning message comes while copying from OLE DB source to Teradata database and if BIG INT feature is not enabled.
Remedy:
Enable BIG INT feature using OleLoad tool. After reconnecting desired source/destination press YES button when asked for BIG INT or LARGE DECIMAL.