Have an amended return with Form 1116, IRS wants schedule b attached.  No matter how I try to do it, the amended return gets rejected.

The error says:

This reject is caused by incorrect PDF attachments. It looks like you have attached PDF attachments under both "Return" mode and "Amended" mode. To resolve this issue, follow these steps:
1. Open the return and do a "Save as" to rename the file, forcing full calculation of the return.
2. If the return is an amended return, reattach the PDF file under "amended" mode. If the return is not an amended return, reattach the PDF File under "Return" mode.
3. Save and re-transmit the return electronically.
If the reject continues, you may need to print and file this return by mail.

I did a save as on the original as a different name, then amended the original.  Everything seems correct but no matter what, I get a reject because of the attachment.  If I don't include the attachment then a reject because no attachment.

I do no see anything anywhere about "return mode" or "amended mode"?

Any ideas would be appreciated.