During each import, information is appended to a log file, and information may also be written to an unprocessed file. Both files are described below.
General information concerning an import is appended to a log file. This information identifies the database and the import file, start and end times, and so on. In addition, if any errors occur during the import, they are also appended to the log file.
Any information appended to the log file will also appear in the the log window so it can be viewed as the import is occurring.
The log file has the same name as the import file but with the file type ".import.log". So if the import file name was yourdata.txt, the resulting log file name will be yourdata.txt.import.log. It is created in the same directory as the import file so they will be found together. The log file is a text file that you can open and examine with any text editor.
The log file associated with any particular import file name is created automatically if not found. The log file maintains a record of activity for a particular import file name, and it can also be used to investigate problems if they occur. However, the log file serves no other special purposes and it can be deleted at any time without compromising the ability to import.
Any import records not processed by the import are written to an unprocessed file. After an import, some records may not have been processed because errors occurred, and/or because you aborted the import. These unprocessed records are written unaltered to the unprocessed file. Because of this, you can subsequently attempt to import them again by importing the unprocessed file. You would presumably do this after the reason they were skipped is determined and addressed.
Suppose you are importing a file with the name yourdata.txt. After the import, if there are unprocessed, they are written to an unprocessed file with the name yourdata.txt.unprocessed_yyyymmddhhmmss, and this file is created in the same directory as the import file. The yyyymmddhhmmss part of the file name will be the time the import was invoked, so if you have multiple unprocessed files they will have unique names. As a result, the import file and any unprocessed files generated by it will be together in the same directory, and any unprocessed files will sort according to the order they were generated. Note however, that it is a good practice to delete the import file after importing it, even if errors or an abort occurs, to prevent any attempt to accidentally re-import the same data. So in general there should be only one import file or unprocessed file in the import directory.
An unprocessed files, like an import file, is a text file that can be opened using any text editor.