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Re: [HTCondor-users] Condor and Photoshop action

On 2/3/2016 8:02 AM, Gandor Florian swisstopo wrote:

It seems to me that Photoshop needs the GUI to run actions and that
HTCondor can’t run applications that need the GUI to work…

In advance, thanks for your answer,


HTCondor is able to run GUI-based applications on the Windows operating system, so long as these applications do not block waiting for keyboard or mouse input (i.e. the GUI application must be able to run as a batch job). How this works is HTCondor dynamically creates non-visible desktop for each slot on the execute node, and it will launch the job on this non-visible desktop. The result is the GUI job runs on the machine without windows popping up on the visible desktop, thus allowing a GUI job to effectively "run in the background" without disturbing the desktop user.

However, at times you may want HTCondor to run your GUI job on the visible desktop. For instance, perhaps you have a GUI job that appears to hang or otherwise fail - what could be happening is the job detected some problem and popped up an error window, but the only way to see this error window is to have the job run on the visible desktop. To accomplish this, as the system administrator you will need to 1) tell Windows to allow the HTCondor service to access the visible desktop if you are running on Windows Vista or above, and then 2) tell HTCondor to use the visible desktop.

See the HOWTO at

Hope the above helps