During the course of a project you may need to change the original data source and update the model or you may also wish to restore the imported data to an earlier state after making changes within LEGION Model Builder. Both these things are easily done from the Data Import Manager.

The Data Import Manager contains two important items of information below the 'File Selection' field:

• Last Import–this indicates when the last import activity took place (new file imported, imported file updated or file restored from cache).
• File last modified–this indicates when the data import file was last modified.

If the 'last modified' date is more recent than the 'Last import' date, this may indicate that the file needs to be updated. In which case, click the Update button (formerly the 'Validate' button) and then, if there are no errors, press Import again.

Every time you import a file, it is cached in the programme's memory and kept until that version is updated as described above. If you go on to modify the imported data within LEGION Model Builder, you can always decide to restore the data from the last validated and imported file. When a file is available in the cache, the 'Import' button will now be labelled 'Restore'. Click Restore to return the imported data to the state it was in at the last successful import.