I execute a protected MATLAB (P-code) file and receive the following error: ERROR: ??? D:\Matlab6p1\work\test.p is a P-file written by a newer version of MATLAB and cannot be read.

Why do I get an error when executing protected MATLAB (P-code) files?

MathWorks Support Team

2009 8 31

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I execute a protected MATLAB (P-code) file and receive the following error:

 ??? D:\Matlab6p1\work\test.p is a P-file written by a newer version of MATLAB and cannot be read.

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MathWorks Support Team 2009-8-31

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P-code files are not expected to be forward compatible, that is, a MATLAB file P-coded in a newer release of MATLAB is not expected to function when executed on an older release of MATLAB. If a P-code needs to be used over multiple releases of MATLAB, it should be created using the oldest release of MATLAB that will be executing the P-code.