Webtrends Analytics 9 Adminstration Guide, November 2012
Import errors occur when your data file contains data that is not formatted correctly. The format of acceptable data is defined by the lookup table. When an error occurs during an import, Marketing Warehouse writes an error log to the Errors folder in your WarehouseDataImport directory
Import error log files are named like this:
where “ImportFileName” is the file name of the configuration file.
Each entry in a column error log contains the invalid row from the data file, the line number of the invalid row, and a description of the error.
888888888888888,Testing,1/1/11----> ERROR (Line 3): Conversion failed because the data value overflowed the type used by the provider.
In this example, the error occurred because the data in the first column of the row contains too many characters.