what does mean the imitation of the proposed solution?

I have submitted a paper to a journal with impact factor 4.2 in the field of computer science. My paper is accepted with major revision, however, a reviewer makes a comment: The imitations of the proposed solution should be further discussed. I did not understand what he means with "imitation".
my paper focuses on pattern recognition.
please if you can help me because realy I want my paper to be accepted

thank you