Although Diio can produce very large reports in real-time and even larger reports in the background, if your report was too large to complete given currently available system resources, we may not be able to process the report. Often, reports which exceed system resources are much broader than what users actually intend to query. Please review the report's parameters and see if it is possible to narrow the scope of the data you are querying. Then visit the User > Report Hub > History page to find and resubmit the report.
There is also a workaround to consolidate duplicate rows, and allow your report to be processed. If you go to User-> Account Settings and change Directionality handling from Full Alpha to Half Alpha. Then you should be able to run the report In Background. See screenshots below.
Please see this FAQ for Diio Half Alpha/Full Alpha explained:
You can also reach out to our Help Desk at firstname.lastname@example.org for additional help in extracting this data from flat files or inquiring about a custom data extract.