For some reason in the middle of my work one of my shell calls stopped working. It is specific to the particular .cmd and nothing I try in VBA can successfully open it now. I simplified it as much as possible, down to this:

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The contents of test.cmd is simply

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So when I run test.cmd, text.xls opens as expected. But when I run the macro I get a command prompt window that flashes and disappears.
Any ideas as to why this could be happening?

Also, if I change test() to run a different .cmd, it works fine as well. Same location.