The pattern (10)([!"%-/0-9:-?A-Z_a-z]{0,20}) indicates that the lot number generated by the AI starts with "10" and can include alphanumeric characters and specific symbols. The length of the alphanumeric characters and symbols can range from 0 to 20.

If everything else is configured correctly and lot numbers are enabled in your settings, verify the product’s configuration to ensure it is set to be tracked by lot.

If the issue persists, review the related operation type you’re executing:

Go to Inventory → Operation Types → Select the desired operation type → Lots/Serial Numbers and check the relevant settings.