For the past month until now, I'm getting the follow dialog from time to time. Probably few times a week. I'm running Windows 7 Ultimate x64 SP1 with all latest updates, and Java 6U29 (1.6.0_29-b11)

Microsoft JScript compilation errorenter image description here

After noticing the icon on the taskbar and some trial and error, I found out that it's from jusched.exe, javaws.exe and javaw.exe. It will disappear if I end task javaw.exe.

Screenshot from Process Explorer

The commandline property is

  • javaws.exe:

    "C:\Program Files (x86)\Java\jre6\bin\javaws.exe"
       -silent -import -reverse -javafxau -system
       -J-Dkernel.download.dialog=false ""http://dl.javafx.com/javafx-cache.jnlp""
  • javaw.exe:

    "C:\\Program Files (x86)\\Java\\jre6\\bin\\javaw.exe" 
      "-Xbootclasspath/a:C:\\Program Files (x86)\\Java\\jre6\\lib\\javaws.jar;C:\\Program Files (x86)\\Java\\jre6\\lib\\deploy.jar;C:\\Program Files (x86)\\Java\\jre6\\lib\\plugin.jar"
       -classpath "C:\\Program Files (x86)\\Java\\jre6\\lib\\deploy.jar" 
      "-Djava.security.policy=file:C:\\Program Files (x86)\\Java\\jre6\\lib\\security\\javaws.policy"
      "-Djnlpx.home=C:\\Program Files (x86)\\Java\\jre6\\bin"
      "-Djnlpx.jvm=C:\\Program Files (x86)\\Java\\jre6\\bin\\javaw.exe" 
       -Djnlpx.vmargs=-Dkernel.download.dialog=false com.sun.javaws.Main
       -silent -import -reverse -javafxau -system http://dl.javafx.com/javafx-cache.jnlp

I'm wondering what is the scheduler calling, and is this a bug or just some incompatibility on my machine. I didn't find much related info from googling.

  • 2
    I have had this same problem on three of my machines. One Win7 x64 Home Premium, one Win7 x64 Ultimate, and one... XP Home x32... – MiffTheFox Feb 12 '12 at 3:24
  • @faulty did you ever figure this one out? – RichK Jun 27 '12 at 10:27
  • @RichK, Nope. The machine has since been formatted. But it doesn't reoccur with 7u. – faulty Jun 29 '12 at 1:36

Had the same issue and found the answer below to be the solution for me

Solution: •In Internet Explorer -> Tools -> Internet Options -> Connections -> LAN Settings •Clear the checkbox in ”Automatically detect settings”

Antonio Álvarez

Source: http://answers.microsoft.com/en-us/ie/forum/ie8-windows_7/microsoft-jscript-compilation-error-syntax-error/e0c048cb-74ca-4d8c-b17f-36b5ca7245de

Cheers! Jeremy

  • Sorry, I can't verify the problem now as I've formatted all my machines and use JRE 7 since. Anyway, the source was a good find. I'll mark your's as answer – faulty Aug 8 '12 at 20:37

This error message means that there is a syntax error in your Proxy auto-config file (PAC file). Probably jusched.exe (the Java Updater) uses JScript to interpret the PAC file, because it needs to detect the correct proxy server.

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