concat problem

Debian Jessie, Supermicro box, SoX 14.4.1, SoX noob.

I ask SoX to concatenate AIFFs, and Mac Air stops at the end of first file.

I've written a Python script (first use of SoX) to concat a lot of
translated MP3s into a big AIFF file. The translation goes fine, and
SoX creates a huge AIFF, but there seems to be an EOF in there at the
end of the first file. Actually a little before the end of the first
file. The Air has been playing files (VLC) for several years with no
problems.

I give SoX a long list of AIFF source files and a destination file
name at the end. The MP3s have been successfully translated to AIFFs
earlier with a format conversion pass through SoX.

What am I missing?

--
Glenn English

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