MILP solver 'GUROBI' failed with exit flag

[sergio valencia ocampo]

Hello all,

I am trying to run the most and the basic conditions with the gurobi solver but 
I get this warning

- MOST: MILP solver 'GUROBI' failed with exit flag = -4
  You can query the workspace to debug.
  When finished, type the word "return" to continue.

Then i get the next error:

- Post-processing results.
NaN's cannot be converted to logicals.

Error in most (line 2102)
      mdo.UC.CommitSched(:, t) = mdo.QP.x(vv.i1.u(t):vv.iN.u(t));

Error in most_ex7_suc2 (line 111)
mdo = most(mdi, mpopt);


I have no idea why the warning or the error should be

Thanks for any hints.
Best regards, Sergio