We currently try to export a PNG from a scheduler with 25000 events. We get an empty PNG whenever we go beyond 10000 events. So maybe 25000 events is too much for the PNG export.
We have also discovered that some event might have been wrongly inputed, and might have an end date that is before the start date. Which might cause problems with the export PNG.
It will take time to correct this data issue, but as a general question, can we agree that 25000 events should be ok for the export PNG feature?