SendObject Lost

I have an e-mail in which I attach a pdf file to someone.

DoCmd.SendObject acSendReport, "SampleDenialLetter", acFormatpdf etc.

I assumed Access defaults to the same folder to pull the attachment but it doesn't. I've changed the SampleDenialLetter but the action keeps pulling up an old version of the pdf. I tried searching for the file but I cannot find it anywhere.

Where is attachment normally file? In the folder as the program? If not, where?

Thanks

SendObject Lost