The system imposes a limitation of a maximum of 10 complex data/segments and criteria.
Why?
This is done primarily to preserve system performance issues. Multiple nested/complex data/segments and criteria increase system load and degrade performance of your (and others) surveys.
Can I request a waiver of this limit?
Not really. This is a system imposed limitation and we are unlikely to change this.
Is there any other way?
Currently you can have maximum 10 groups at a time. If you need more Groups you can delete the Groups that are not required and create new Groups. Deleting the Groups does not affect the data in any way.