To use the barrier algorithm without crossover with cplex 20.1, you can use the following options:
- set lpmethod 4 (this selects the barrier algorithm):
[![enter image description here][1]][1]
- set solutiontype 2 (this deactivates crossover):
[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/vs6tn.png
  [2]: https://i.sstatic.net/pi3Pq.png