Why does the Update Installer fail with either no clear error message shown or with "File on disk does not match expected meta data" in the log file?

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When trying to install an update with a standalone installer, the installation process terminates with the message:
Installation failed [1]
Or if I open the installation log file, there are lines reading with
Warning: File on disk does not match expected meta data
How can I resolve this?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 31 Mar 2023
Edited: MathWorks Support Team on 31 Mar 2023
This usually means that the file being looked at was modified. There are a few recommended solutions to try:
  1. Uninstalling and reinstalling the affected products and then apply the update to a clean installation.
  2. Running the update as an administrator.
  3. Disabling any antivirus software.
  4. Uninstalling and reinstalling MATLAB and of its products with administrative privileges, antivirus software disabled, and then attempting the update once more.
  1 Comment
Royi Avital
Royi Avital on 14 Jul 2018
Edited: Royi Avital on 14 Jul 2018
Reinstalling is a mess. Any option to add `force` mode to the updater?
I have this issue for update 4 of R2018a on Linux. The installation of MATLAB is a folder which requires root for write permission. The only program touched those files was Update 3.

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More Answers (4)

Justin Ghetti
Justin Ghetti on 19 Jul 2018
Edited: MathWorks Support Team on 9 Jun 2022
If you are still experiencing this issue, please contact MathWorks support:

kira on 8 Aug 2018
hello, same issue here!!! Any fix?

James Macdonald
James Macdonald on 1 Apr 2019
Turn off your anti-virus software and reinstall Matlab. On my system, the anti-virus software was altering the date modified timestamps at installation, which was triggering the meta data check to fail when trying to update Matlab.

Faheem Ershad
Faheem Ershad on 29 Oct 2019
So I went into the log file and searched for the "Skipping update" line as the support team suggested. For my case, I was getting the "Skipping" a couple lines after a line that listed this as the problematic directory:
That's in your MATLAB/r2018a/ folder by the way.
I went into that directory and saw that there was a -OLD addition at the end of the .dll file. In other words, the file in that directory was named this:
I copied that file in the same directory and removed the -OLD from the end so that the file name ended with the .dll extension. I ran the update installer again and it worked!
Just for context, I was trying to update r2018a (update 1 I believe) to r2018a update 6.


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