we are testing your product at the moment ( version 2021.1.1) and everything went fine so far.

The data is coming from a mysql database.
Now we have come across a problem we don´t understand because we assume
we did everything right?
Ther report runs wonderful in designer preview but when we publish it to our application
(php) and call it, it only returns a blank page? Another report which we used to test is just
a simple listing (grouped) which runs just fine.
So it seem as there is a problem with "new DateTime"? Maybe not working outside the designer ?
I have enclosed a few hardcopies - which we hope can be helpful - to find out
if we did something wrong or what the problem is. This is a function which will be essential
to us.
If you need anything else, just let me know it.
Thanks for your time and best wishes
Wilfried