Dear reader,
Every now and then you stumble upon a challenge that does nothing but you smashing your head against the wall for way too long.
This is one of then.
I have a form on a custom table. Within this form I placed a subgrid that shows data from a related table.
This works like a charm!
But, now my colleague starts testing my work and instead of no records or a few, he sees this pesky error message:

This colleague is System Administrator, just like me. There are no other security models used (no teams, no extra business units besides the base one). All views are added to the MDA...
I'm completely lost.
Any bright ideas?
(I asked bravely, being 100% sure that the solution is way too easy to not cry myself into sleep tonight)
Thanks a million!
Regards,
Jeroen