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Unable to install U2000 client

Publication Date:  2018-07-23 Views:  1090 Downloads:  0
Issue Description

It is needed to install U2000 client. The error information “unable to launch the application.” appears when we run the cau application.


Alarm Information

We can see the detail information after clicking the details button from the above picture: 
Unsigned application requests unrestricted access to the system. The following resource is signed with a weak MD5withRSA signature algorithm and is treated as unsigned:

Handling Process

Check the Java version:




If it is java 8, the version is not supported for cau. We need to remove the program and reinstall the java 7.

Root Cause

1.      JRE version is too high for cau application.
2.      JAVA cache is broken.


1.      Remove the JRE 1.8.0_171.
2.      Delete the cache of JAVA and cau
JAVA: enter the folder: %userprofile%\AppData\LocalLow\Sun\Java\Deployment and delete folder cache and file
Cau: enter the folder: %allusersprofile% and delete the folder .cau and cache
3.      Install the JRE from cau website.
4.      Rerun the cau application.