Unknown data

When input data is validated, additional data that does not validate as part of the input may also be found. This data is unknown data.

An example input is composed of Product(s) and Product is not defined with properties that allow its existence to be predetermined.

The second Product is invalid because the Quantity field is missing.

When the invalid Product is found, it is not known to exist. Therefore, it is assumed to be unknown data.

Sometimes a message about unknown data is not significant. You may get a message about unknown data because there are extra carriage returns or "junk" data at the end of an input file. You should read the trace file to determine whether all of the pertinent input data was found.