Why do I receive the error "License File Error: Unable to read license file" when performing a silent installation?

During a silent installation, the output log file states an error message similar to the one below:

License File Error: Unable to read license file    at com.mathworks.install_core_common.MATLABInstallerExceptionUtil.getValidationException(MATLABInstallerExceptionUtil.java:20)    at com.mathworks.matlab_installer.operations.LicenseFileSelectionOperations.showInlineException(Unknown Source)    at com.mathworks.matlab_installer.operations.LicenseFileSelectionOperations.getLicenseString(Unknown Source)    at com.mathworks.matlab_installer.services.LicenseFileSelectionServices.validatedLicenseFile(Unknown Source)    at com.mathworks.installservicehandler.context.ExceptionInterceptor.invoke(ExceptionInterceptor.java:21)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:498)    at com.mathworks.installservicehandler.JsonPassThroughResponseWrapper.getData(JsonPassThroughResponseWrapper.java:24)    at com.mathworks.installservicehandler.JsonPassThroughResponseWrapper.getData(JsonPassThroughResponseWrapper.java:10)    at com.mathworks.installservicehandler.InstallServiceHandlerClient.executeService(InstallServiceHandlerClient.java:18)    at com.mathworks.matlab_installer.MatlabInstallerClient$4.executeService(Unknown Source)    at com.mathworks.installjscommon.InstallerClientUtility.executeGetNextStateInSequence(Unknown Source)    at com.mathworks.matlab_installer.MatlabInstallerClient.clientMain(Unknown Source)Caused by: java.lang.Exception: License File Error: Unable to read license file    ... 15 more

 

Answer 1

[MathWorks Support Team]

This error message typically appears when using a network.lic license file instead of a license.dat file in the licensePath field for the installer_input.txt

If the remainder of the output log file indicates "End - Successful" on the last line,

(or if the installation log file indicates a successful installation)

Where are the MATLAB Installation and Activation log files located?

https://www.mathworks.com/matlabcentral/answers/101927

The output file may be reporting a false error. This is currently being investigating by MathWorks. 

The installation may have completed successfully and may still require MATLAB to be activated.