Invoice Email sending Blank PDF

I am using desktop version , i have configure email and working ok but when i am sending from sales invoice with PDF , the attachment found blank copy of PDF insted of invoice copy.
please suggest …

What version number? And please illustrate with screen shots.

Version is 21.8.37

What operating system?

  • Windows 64 bit
  • Windows 32 bit
  • Mac
  • Linux

What version of the operating system?

Windows 7 Pro
64bit

FYI - Im using a mac with the same version number and desktop - There is no problem sending emails with pdf attachments