There can be 3 reasons why a rank might not have been assigned in KCET:

1. Your 12th marks missing
2. You must have marked the code inversion wrong
3. Revaluation of your 12th means your marks must have changed and a new rank needs to be assignment.

But COMEDK results do not have ranking yet. The marks will be displayed first when the results have been declared and then the rank will be given in the Merit list. Every Candidate who has appeared for the exam will be assigned a rank in the merit list.