PO Communicate from Tools->email missing attachment

Hi!

When do request "Po Output for  communication" and delivery option to email -> get the PDF and email

When open the same order in  PO summary form and from Tools ->Communicate->Email

put the email address, Amercian -> the email is received but not attachment.

1.Preferences for email is set : HTML with attachments

2.  Setup options in place: Setup => Organization => Purchasing Options
    •  Set the Output format to:  PDF
    •  Set the Maximum Attachment Size to 4 (MB)
    •  Set the Email Attachment Filename (for example Attachment.zip)

Tried with different ( not zip, with 10 Mb), not help

The attachment is not there

3.RUn wfstat.sql -> no error in wf.