vsViewer not working

[Ichirare]

Assuming you are referring to something like:
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File open error
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Failed to open the file J:/tmp/tempPreviewVapoursynthFile12_56_16_740.vpy.
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OK 
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That is a 'File open error' that is thrown, since vsViewer by default, does try to open the last file it was opened with before.
If that file does not exist, it complains about that.
That is no indication, that vsViewer does not work.

Cu Selur

Thanks. I misunderstood that then. I thought it is going to open my current job / script for editing so I can fine tune the Hybrid output