MailApp.sendEmail method signature exception: The parameters (class) don't match

Question

I'm trying to attach a file with an email i'm sending through Google Sheet Script: "Exception: The parameters (number[],String,String,(class)) don't match the method signature for MailApp.sendEmail."

I've tried the function "MailApp.sendEmail" with the methods (number[],String,String) and it worked properly, however when adding the attachment part, it's failing...

    var file1 = DriveApp.getFilesByName("why abilix.PDF");
    var emailBody = textTemplate[0][0].replace("{patient.name}",patientNames[i][0])
                                .replace("{stage}",phase[j]);
    var emailAddress = patientEmails[i];
    MailApp.sendEmail(emailAddress, subject, emailBody, **{
                      name: 'Automatic Emailer Script',
                      attachments: [file1.next().getAs(MimeType.PDF)]}**);

Answer 1

Try

MailApp.sendEmail({to: emailAddress, subject: mySubject, htmlBody: emailBody, 
     attachments: [file1.next().getAs(MimeType.PDF)],
     })

may be subject can also cause an error ... change the term!