Why does installer fail on Windows with the error: "Installer error: exception calling main"?
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When launching the installer on Windows, the following error occurs:
ERROR: Installer error
exception calling main
The installation then fails
The installer may also show this error
ERROR: "There is an invalid character (!) in Your temp directory. Please remove the invalid character from your TEMP (or TMP) environment variable and run the installer again"
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MathWorks Support Team
2024-7-29
编辑：MathWorks Support Team
2024-7-29
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This error can occur if:
- The installation files are corrupt or incomplete.
- The installation files were downloaded into a folder that contains other files (i.e. not downloaded into a separate folder).
- You are trying to install in a folder where a different MATLAB version is already installed.
- There are one or more non-ASCII characters (e.g. an exclamation point) in the environment variables TEMP and/or TMP
- There are one or more non-ASCII characters (e.g. an exclamation point) in your username.
To resolve this issue:
- Obtain new installation files, and then run the installer again.
- Move the installation files into a separate folder (e.g. C:\matlab_temp), and then run the installer again.
- Verify that you are installing in a folder that does not contain a different MATLAB version.
- Verify that there are no non-ASCII characters in the environment variables TEMP and/or TMP.
- Verify that there are no non-ASCII characters in your username.
If you are running the installer from a CD or DVD, please see the following support article:
Why do I receive an "Unexpected/Unknown Exception" error when installing MATLAB from CD/DVD media?
If you are still unable to start the installer, please contact MathWorks Support:
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2011-8-9
2024-7-29
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