As far as I understand there is a maximum size of 10,000 cells that can be returned from a hypercube.
So if your qWidth = 2,
qHeight=5000, then that there 2*5000= 10,000 is your limit. Anything other than that will result in the below:
Maybe this is the issue?
If you need more than that you need to pay to the object for that additional data.(I'm not sure how this part works though)