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RHEL7 "Installer User Interface Mode Not Supported"


Article ID: 94794


Updated On:


CA Application Performance Management Agent (APM / Wily / Introscope) INTROSCOPE


When running the installer for APM10.7.0 on Redhat 7.4, I get the below response.  I followed the recommendation on and did an "unset DISPLAY" but I get the same message. I turned on LAX debug and the output is below.

XMLScriptReader: unable to parse the provided script file.  File may have been invalid...
        at Source)
        at Flexeraan9.ak(Unknown Source)
        at Flexeraan9$1.aa(Unknown Source)
        at Source)
        at Source)
        at com.zerog.ia.installer.LifeCycleManager.b1(Unknown Source)
        at com.zerog.ia.installer.LifeCycleManager.a8(Unknown Source)
        at Source)
        at com.zerog.ia.installer.LifeCycleManager.consoleInstallMain(Unknown Source)
        at com.zerog.ia.installer.LifeCycleManager.executeApplication(Unknown Source)
        at com.zerog.ia.installer.Main.main(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
        at java.lang.reflect.Method.invoke(
        at com.zerog.lax.LAX.launch(Unknown Source)
        at com.zerog.lax.LAX.main(Unknown Source)
Unable to load the script.


Installer User Interface Mode Not Supported

Unable to load and to prepare the installer in console or silent mode.



10.7 but could happen in earlier 10.x as well.  Redhat 7.x using Java 1.8.0_112 or higher.  This could also happen updates between 65 and 112 as well.  This was also reproduced on 1.8.0_171.


This is caused by a bug in Java 1.8.  Initially tried to reproduce on 1.8.0_65 and did not run into the problem.  Only when upgrading to 1.8.0_171 was the problem reproduced.  In the above situation, it was seen on 1.8.0_112.  In the links below, it states that this was first reported in update 131, however this has not been verified.

From this link:

We can get to this link which contains the workaround.  In short, the workaround is to switch back to Utopia fonts in /etc/fonts/local.conf.  Patches in switched the font to STIX.  This doesn't work right with the headless java in OpenJDK.

So all you have to do is create a local.conf in /etc/fonts (if you don't have a file, my system did not.) and enter the text from the second link in there.  Save and exit and re-run the installer.  This should fix the "Installer User Interface Mode Not Supported" error.

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