Scheduled reports run but do not send an email.
However when I open the report and click email the report does get delivered.
Release : 10.0
Component : NQRPTA - REPORTERANALYZER
The issue was the timezone on the report. It was set to GMT while the customer was on a different timezone.
The reports were just delayed.
Changing the timezone on the report to match the local timezone managed to get the scheduled report in time.