Set the compression to Enable (compressed) for massive files like stadiums or audio. For small script databases, some modders prefer setting it to Disable to prevent game stutters.
Even a perfectly built CPK won't work if the game doesn't know to load it. cpk file builder pes 2017 fix
The screen flickered. And then—perfect, crisp, alive—the kit appeared. The faces loaded. The stadium echoed with the real chants he had ripped from a YouTube video filmed in 2015. Set the compression to Enable (compressed) for massive
Common Problems with CPK Builders
It worked.