Taskbar: Grouping by AppID not working


  1. ssri
    Posts : 16
    Windows 7 Professional 64bit / Arch Linux x86_64
       New #1

    [SOLVED] Taskbar: Grouping by AppID not working


    Hi everyone,

    I'm using this java-based image processing and analysis software ImageJ (ImageJ) and after a recent windows update, the program no longer groups together like it once did. Each instance of the program shows up as separate apps on the taskbar. (see attachment) Image stacks that are loaded in different running instances of ImageJ are grouped with the corresponding instance.



    Other programs are still grouping normally, but not ImageJ (see above image). I run ImageJ through the same .exe file (C:\Program Files\ImageJ\ImageJ.exe)

    Both 32- and 64-bit versions of ImageJ display the same abnormal grouping activity.

    Maybe I have to create a custom launcher like someone suggested in this thread: How do I group non-grouped applications in the taskbar?

    Any tips, suggestions? Thanks
    Last edited by ssri; 14 May 2010 at 17:26.
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  3. unifex
    Posts : 797
    Windows 7 Ultimate (x64)
       New #2

    Hi ssri and welcome to the forums!

    Can it be that now you really have different instances of your program running as opposed to just several windows? What does the Task Manager show? Is there one process for ImageJ (as I imagine you have for Firefox) or several different processes?
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  4. ssri
    Posts : 16
    Windows 7 Professional 64bit / Arch Linux x86_64
    Thread Starter
       New #3

    unifex said:
    Hi ssri and welcome to the forums!

    Can it be that now you really have different instances of your program running as opposed to just several windows? What does the Task Manager show? Is there one process for ImageJ (as I imagine you have for Firefox) or several different processes?
    Hi,

    They have different PIDs (processIDs?) in taskmanager running under as javaw.exe. However, this is not unusual, as this has been the case ever since running it in windows xp. When I first installed win7 pro 64, ImageJ ran as multiple instances of javaw.exe and grouped fine. Are appIDs the same as PIDs?
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  6. ssri
    Posts : 16
    Windows 7 Professional 64bit / Arch Linux x86_64
    Thread Starter
       New #4

    Okay, I figured it out after reading this link on msdn (search for 'registering an application as a host process'). Run regedit.exe as an administrator and go to Computer\HKEY_CLASSES_ROOT\Applications\javaw.exe. Remove the string value 'IsHostApp'. Start ImageJ over again, and the application groups as before even though there are three instances of javaw.exe running in taskmanager with different PIDs.

    Please mark this thread as solved
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