UnsupportedDataTypeException

Question

I'm using the Java Mail API (Sample Code)to send a Multipart Mail with Attachment (*.jpg).
Everything works fine in JBuilder (German W2K machine). THEN I generate a JAR with all sources.The GUI comes up , then I push the send button and this happens.
javax.mail.SendFailedException: Sending failed; nested exception is:
class javax.mail.MessagingException: IOException while
sending message; nested exception is:
javax.activation.UnsupportedDataTypeException: no object
DCH for MIME type multipart/mixed;
boundary="----=_Part_0_16749301.1029937112375"
Could anyone pleeease help ?!
############# the Code
roperties props = System.getProperties();
// Setup mail server
props.put("mail.smtp.host", host);
// Get session
Session session = Session.getInstance(props, null);
// Define message
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(mailTo));
message.setSubject(subjText);
// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();
// Fill the message
messageBodyPart.setText(mailText);
// Create a Multipart
Multipart multipart = new MimeMultipart();
// Add part one
multipart.addBodyPart(messageBodyPart);
// Part two is attachment
// Create second body part
messageBodyPart = new MimeBodyPart();
// Get the attachment
DataSource source = new FileDataSource(filename);
DataHandler dh = new DataHandler(source);
// Set the data handler to the attachment
messageBodyPart.setDataHandler(dh);
// Set the filename
messageBodyPart.setFileName(filename);
// Add part two
multipart.addBodyPart(messageBodyPart);
// Put parts in message
message.setContent(multipart);
// Send the message
Transport.send(message);
THANKS in advance

Answer 1

Hi,
Try this
replace in your code
// Get the attachment
DataSource source = new FileDataSource(filename);
With this
File f = new File(filename);
DataSource source = new FileDataSource(f);
bye