Problems with a martini run in gromacs

GROMACS version: 5.1.5
GROMACS modification: No
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I am trying to calculate the MD simulation of a protein in a membrane, using the martini force field. The charmm-gui server produces several steps, two of which are minimizations. When running the whole set of procedures, the program stops after the first minimization. It doesn´t write the files necessary for the second minimization. I don´t know what would be the source of the problem. Although it complains about the number of steps, I don´t believe it is the source of the problem. Being a new user, I am unable to upload the necessary files for your perusal. How could I upload these files

Thanks in advance

Please report the error you get at the end of the minimization. Or any warnings you get in the preprocessing phase. Also I noticed that you run with an old version of GROMACS, check that your input files are compatible with GROMACS version, or install the current GROMACS version.