Eugenol, I am new to this framework but looking at your issue I would suggest a couple of things: a) Does the recipients hash have anything in it prior to the call b) Why type of object are in recipients ? Can they be marshalled ? -Fernand -------------- next part -------------- An HTML attachment was scrubbed... URL: http://rubyforge.org/pipermail/backgroundrb-devel/attachments/20060812/59ea20ad/attachment.html