Not sure if you are aware of this but the new property SkipBlankPages in 2021/R1 will result in a corrupt (unopenable) PDF/XLS if the report contains no data.
The output used to be a blank report.
This behaviour is fixed by setting the Value to 'False' but this now requires the developer to remember to set this value on each new report. Perhaps the default should have stayed as 'False' and those who wish to remove blank pages could set it to true.
We are aware the property is set to true by default.
We have now had to modify (and subsequently retest) > 100 reports.
The generator should probably not create a 'corrupt' file in these cases.