Thank you for your post.
Since you didn't post a script, try using the following:
Set Variable [ $PDFPath ; Value: Get (DocumentsPath) & <filename.pdf> ]
Send Mail [ Send via E-mail Client ; To: <email address> ; .... ; "$PDFPath" ]
If you want this to work on both FileMaker Pro and FileMaker Go, you can use Get (SystemPlatform) to determine if this is on an iOS device or Mac/Windows computer. The function Get (SystemPlatform) returns "3" if it is an iOS device. For the following example, assume the PDF file generated is called "Invoice.pdf". The script may look like:
If [ Get ( SystemPlatform ) = 3 )
Set Variable [ $FileName ; Value: "Invoice.pdf" ]
Save Records as PDF [ No dialog ; "$FileName" ; Records being browsed ]
Set Variable [ $PDFPath ; Value: Get (DocumentsPath) & $FileName ]
Send Mail [ Send via E-mail Client ; To: "email@example.com" ; Subject: "Invoice" ; Message: "Test" ; "$PDFPath" ]
<your current script step(s) to send the PDF file on the Windows/Mac machines.
Let me know if you need clarificaton for any of the above steps.