LOCATE limits each user to running 3 concurrent background reports at one time. This is to prevent individual users from queuing up large numbers of reports. Automated print events are not subject to this, neither are scheduled reports.
You will receive this prompt when you already have 3 concurrent reports running in the background. We recommend allowing reports to finish running in the background before attempting to continually run more reports.
NOTE: ALL support sessions and Cron driven reports share the same user.