Validation checks the entire list mode file and reports every error, each tagged with the line number where it occurs.

Validation runs automatically as soon as a file is loaded. You can run it again at any time by clicking Validate. Validation always reads the file from disk. This means you can edit a file in your external editor and click Validate again to recheck it; no special reload step is needed.

The following is a typical fix-and-recheck workflow:
  1. Load a file. Validation runs automatically.
  2. Click Open Source File to edit the file in your default CSV editor.
  3. Save your edits in the editor.
  4. Return to the utility and click Validate to recheck the file from disk.
  5. Repeat steps 3-4 until the file is valid.
When errors are found, the status indicator turns red and the console lists the problems by line number. From the console, you can select from the following actions:
  • Copy—Copy all errors to the clipboard.
  • Save—Export the errors to a TXT file. The default filename is <source_filename>_errors.txt, saved in the same folder as the source file. You can change the file name and location.
  • View All Errors—If there are many errors, expand a scrollable panel to see each one.
    • You can choose to either fix errors first or proceed with a conversion despite errors.