Determine what works from the commandline and use that.

You probably want something like: start application_name filename

Perhaps you need quoting, switches or similar.

As you haven't told us what this non-default application is, it's rather difficult to advise what syntax you should be using.

-- Ken

In reply to Re: How to open a gif file with non-default application by kcott
in thread How to open a gif file with non-default application by newbie_coder

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