Problem
If multistreaming is enabled on an Illustra Flex camera, you cannot use ExacqVision Client to change the resolution on any stream except for the last stream added. Affects firmware earlier then 3.0.5.
Workaround
If you want to change the resolution on a previously added stream, you must first delete any streams added after that stream. After the resolution is changed, you can then add streams as desired.
Solution
Update camera firmware to version 3.0.5 or higher.