MATLAB PCode Warning on R2021a

11 views (last 30 days)
Danny Gho
Danny Gho on 10 Sep 2022
Commented: Kiran Kintali on 4 May 2023 at 15:32
I am running MATLAB r2021a and I got this warning
Warning: P-file /home1/apps/matlab/2021a/toolbox/matlab/datatypes/isprop.p is older than MATLAB file /home1/apps/matlab/2021a/toolbox/matlab/datatypes/isprop.m.
/home1/apps/matlab/2021a/toolbox/matlab/datatypes/isprop.p may be obsolete and may need to be regenerated.
I understand that this mean that I need to regenerate the P-Code, but considering this is from matlab default toolbox, is there any way I can 'reset' my installation? Keep in mind that my matlab install is managed so I prefer something that can be done in the command line.
Thank you very much for your attention.

Accepted Answer

Jan on 10 Sep 2022
Edited: Jan on 10 Sep 2022
This can happen only, if somebody has edited the file isprop.m . Modifying Matlab's built-in functions is not useful and this cannot happen, if you work without admin privileges.
"I understand that this mean that I need to regenerate the P-Code." - no, don't do this. Usually the M-files of the toolbox functions contain the help section only. If you P-code them and overwrite the original P-file, the Matlab installation is damaged and need a repair e.g. by a re-installation.
The solution is to restore the original version of isprop.m from a backup or to re-install Matlab. Afterwards do not work with admin privilegs such that you cannot change the toolbox functions by accident.
Kiran Kintali
Kiran Kintali on 4 May 2023 at 15:32
Xilinx / Vitis Model Composer tech support team can be reached here.

Sign in to comment.

More Answers (1)

Walter Roberson
Walter Roberson on 10 Sep 2022
I can tell from the path that you are using Linux. For Linux or MacOS, you can use the system utility touch utility to change the modification date associated with a file; see


Find more on Introduction to Installation and Licensing in Help Center and File Exchange




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by