Why won't Simulink Onramp launch?

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Jerry Jenkins
Jerry Jenkins on 10 Mar 2021
Commented: Omer Faruk on 8 Nov 2022 at 22:52
Whenever I attempt to launch Simulink Onramp, I recieve an error saying "Simulink Onramp failed to launch. The system temporary folder is a subfolder of 'CacheFolder', which is not supported. Change the 'CacheFolder' so it is not a subfolder of the system temporary folder." I cannot find 'CacheFolder' through searching the computer, and I do not know how to change this subfolder. How can I fix this error?

Accepted Answer

Asvin Kumar
Asvin Kumar on 16 Mar 2021
The 'CacheFolder' mentioned is from Simulink preferences > General.
More details on it are given in this section from the page on Simulink general preferences. Like it mentions, the setting is empty by default and that means that the Cache Folder uses the present working directory (pwd). You could try either of the following:
  1. Verify whether your current directory is under the temp folder. Change the pwd to a folder that is not under the temp folder.
  2. Manually set the Cache Folder under Simulink general preferences.
Here's how to get details about the current Cache Folder programmatically: Get File Generation Control Parameters
Here's how to modify the Cache Folder programmatically: Set File Generation Control Parameters
You can use tempdir to see the System Temp Directory.

More Answers (2)

Aravind Mallemputi
Aravind Mallemputi on 6 Sep 2021
please show me the procedure.
Omer Faruk
Omer Faruk on 8 Nov 2022 at 22:52
myCacheFolder = fullfile('C:','aNonDefaultCacheFolder');
myCodeGenFolder = fullfile('C:','aNonDefaultCodeGenFolder');
Simulink.fileGenControl('set', ...
'CacheFolder',myCacheFolder, ...
'CodeGenFolder',myCodeGenFolder, ...
'keepPreviousPath',true, ...
copy the code above then paste into matlab code area and run it.

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Shaopan Guo
Shaopan Guo on 2 Jun 2022
You can just change your current working space directory.


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