Hello Marcia,
This issue is something that will occur if your spreadsheet is incorrectly formatted (normally a bug in excel). I see this error when using excel to modify spreadsheets for import. Excel has some bugs that unfortunately, will not always insert all of the necessary commas to format the spreadsheet for import as it should. This is something that can only be seen by opening up the file as a text file. This can normally be resolved though by inserting "FALSE" into the delete column for each product. This forces excel to format the spreadsheet correctly.
QUOTE (marciafcfc @ Oct 22 2009, 11:40 AM)

I've exported a csv file with specific fields checked. I've made simple changes, weights, categories, manufacturers, and every time I go to import, there are hundreds of deliminator errors.
Ex.: The delimiter ',' can´t be found after the field 'taxfree' at line 17 (the record has less fields, the delimiter is wrong or the next field must be marked as optional).
or
The delimiter ',' can´t be found after the field 'manufacturerpartnumber' at line 484 (the record has less fields, the delimiter is wrong or the next field must be marked as optional).
What are these and how can they be corrected? The errors are preventing 100s of products from updating.
Marcia