Level 3

Custom install requirement

Before any install UI starts up, I want to check the target system for a particular file. If the file exists continue on. If it doesn't then install should continue. I know how to search for a file, but were exactly do I put the wizard action and how do I make it propmt the user?
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Level 2

I'd put it in the Behavior and Logic > Sequences > Installation Sequence > Pre-Install. Hope that helps.
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Level 2

My problem is somehow related to this one: I'm trying to go to the previous wizard screen from inside of my custom WizardActionBean.
This is my custom code:

SwingWizardUI ui = (SwingWizardUI)event.getUserInterface();

What am I doing wrong? Please reply.
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