Even if the decoder is non-malicious code (e.g., a Python script that parses P-code), most antivirus engines flag it as "HackTool.MATLAB.Pcode" because it manipulates proprietary file formats. Your IT department may automatically quarantine or report you.
If you have a .p file but need the source: matlab p-code decoder.7z
Many authors will provide source code to legitimate owners upon request. Even if the decoder is non-malicious code (e
Treat the P-code as a black box. Write a test script that feeds it inputs and records outputs. You can then approximate the original function using curve fitting or machine learning. This is perfectly legal and a standard engineering practice. Many authors will provide source code to legitimate
You might spend hours downloading, extracting, bypassing antivirus, and running a decoder only to find it requires an older MATLAB version, a special DLL, or crashes immediately.