If you’ve lost your original .m files, your best bet is looking for backups or using the which command to ensure the source isn't just hidden in another directory. If you're trying to understand someone else's P-code, the only legal path is to contact the author and ask for the source.
Example Post:
Modern P-code uses AES-256 encryption for the code content, making it highly resistant to standard extraction methods . matlab pcode decoder7z 39link39
While you may find unofficial links or discussions regarding "decoders," here is the critical context regarding MATLAB P-code and its accessibility: Understanding MATLAB P-Code If you’ve lost your original
MathWorks implements multiple protections: matlab pcode decoder7z 39link39
Would you like help rewriting functionality that you suspect is inside a P-file instead?
pcode yourfile.m