Tmail talk - Jun 2008 - Adding attachment generates no boundary

hi together,
 
when adding an attachment to a mail I want to send via SMTP I get the
following error:
 
C:/localapp/apps/development/ruby/lib/ruby/gems/1.8/gems/tmail-1.2.3.1/l
ib/tmail/mail.rb:556:in `quote'': can''t convert nil into String
(TypeError)
 
This happens in method "read_multipart" and obviously when adding an
attachment a boundary is not created. Now I''m a little bit puzzled if I
do this wrong or if there''s a problem in the Mail class. 
 
Here''s my code:
 
def setup_mail_attachments
      
      @mail = TMail::Mail.new  
      @mail.date = Time.now
      @mail.from = @from
      @mail.to = @to
      @mail.subject = @subject
      @mail.mime_version = ''1.0''
      @mail.set_content_type("multipart", "mixed")
      
      mailpart1 = TMail::Mail.new
      mailpart1.body = @body
      mailpart1.set_content_type("text", "plain")
      
      @mail.parts.push(mailpart1)
      
      @attachments.each do |att|
        if FileTest.exists?(att)
          
          fname = File.basename(att)
                                 
          f = File.new(att,"rb")
          
          content = f.read
                    
          mailpart=TMail::Mail.new
          mailpart.body = Base64.encode64(content)
          mailpart.transfer_encoding="Base64"
          mailpart.set_content_type("application",
"octet-stream")
          mailpart[''Content-Disposition''] = "attachment;
filename=#{fname}"
          @mail.parts.push(mailpart)
        end
      end
      
    end
 
BTW: If I add the following code to method read_multipart in Mail class
everything works fine:
 
   def read_multipart( src )
      bound =
@header[''content-type''].params[''boundary'']
# ADDED      
      if bound == nil 
       bound = ::TMail.new_boundary
      end
#END ADDED
      
      is_sep = /\A--#{Regexp.quote bound}(?:--)?[ \t]*(?:\n|\r\n|\r)/
      lastbound = "--#{bound}--"
...
end
 
thanks for your help 
 
Andreas
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Thanks Andreas
> BTW: If I add the following code to method read_multipart in Mail class
> everything works fine:
Could you make a test case (and patch) and submit to the tracker at
tmail.rubyforge.org?

Regards

Mikel