Cannot find TopComponent with preferredID

Question

I\'m trying to run my simple java-program, but have a big problem. It\'s connected with GUI. It can not show any created window. I attach stack-trace and one class.

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Answer 1

This problem "cannot find TopCoponent with preferredID..." happens frequently when a problem occurs before loading the TopComponent.

A simple example : you try to load something in the constructor that fails (at any depth).

This unexplicit message made me mad more than once !

Hope this helps.