Hi,

With the bulk uploader there are a few things to check
1. Make sure there are no duplicate rows in the file - specifically make sure no rows share the same [aa_run_id, style_variant_id, eta]
2. Has this same file been run before? If it has, then at least some of buy lines with the same batch ID (called aa_run_id in the file) already exist in FashionThing and either have to be deleted (if they aren't on POs) or you have to remove them from the file before it can successfully upload.
3. If neither of the above are true, but the file is very large, it might work if you break the file into a few smaller files

For #2 above, it might be easier to generate a new upload file from Salsa then hunting through FashionThing for the various rows in the file or buy lines that you need to delete.

Hope it helps!