pdf attachment blank in some email address

Hi, i have order to make webservice for send an email with pdf attachment.
i success create that and the email successfully send, but i got issue in some email the pdf i send is blank, how to solve this problem, because i didnt see any error in my flow service

Hi Irsyad,

can you provide an outline of your flow where you create and send the email?

Might be an encoding issue.

Regards,
Holger