Thanks a lot. We did cmk --debug -vvI HOSTNAME , and help us to know where was the problem. A few weeks ago we did a test with a scripts for a wind power equipment, and we put it in the directory where is all the check MK plugins. We didn’t remember that and in the output of the command showed up and error about the name of this script that we were testing …we erase the script from there and the problem was solved. Thank you very much!!!