Windows 7: 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

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 Windows 7 pro 64, ImageJ ran as multiple instances of javaw.exe and grouped fine. Are appIDs the same as PIDs?

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