Hello there,
I'm facing an strange scenario. We have migrated from BO 4.0 to 4.1 SP03 at the end of the 2014 year. That report schedule works fine until last week.
The scheduling to email from a report that works over a multisource universe is failing, and it seems to be the only one with that kind of troubles in our system with all of the available output formats. Under the keyuser user credentials and the admin credentials of mine. 
I've checked the e-mail destination of all of our three Adaptative Job Servers and they're ok (if not, the other schedules must fail also).
Is there anyone who could guess what's happening?
Thank you very much in advance,