[OMPI users] MCA parameter

[Yasmine Yacoub]

  Good morning,

  after installing pwscf and running an example, I got a warning message 
related to the MCA parameter. To fix it I have tried all the steps indicated in 
the FAQ link but it doesn't work. please which command I have to use and from 
which directory can use it. perhaps I didn't use the right one.
    Yours sincerely,