In general, using diagnostic software is not encouraged during the contest. If you do want to use diagnostic software, the contestant must bring inform the contest chair prior to the contest starting, and they must provide proof that the software is released as “Open Source”. A list of permitted “Open Source” licenses can be found at https://opensource.org/licenses
The contest is designed in a way where diagnostic software will likely not be effective in solving the modules. We want contestants to demonstrate their knowledge of the skills standards, not just run software.