WSQ file - not a picture

[pinocle]

I'm trying to convert some WSQ images to PNG on XnConvert Version 1.63 - x64 (Feb 10 2014) - Libformat version 6.55
I load the input file and when I hit "convert" I get the following error.

TJFEVOBH_LeftThumb_Finger.wsq 0x0x0 : not a picture
Input files: 1
Extracted pages: 0

Total Duration: 0 second(s)

I'm using this on OS/X 10.9.2

-Pin

[xnview]

WSQ file is only supported on windows