How do I resolve an "Error: Missing Attributes" message from Google Base?

You may see one of the following errors from Google Base, which may cause some or all of your products to not be processed.

• The item is missing a required attribute.
• We were unable to match the attributes in this dsv (delimiter separated values) data feed line to the corresponding attributes in the header (first) row.
• You must enter an item title. *Title* is a required attribute.
• Product name missing
• We didn't understand the header (first) row of your file. Please make sure you're using valid attribute names.

To resolve these errors, please check the settings in your Google Base account as described in this support question.