imcopy seems to work for me
vocl> imcopy dev$pix image.short
dev$pix -> image.short
vocl> imcopy dev$pix image.short
dev$pix -> image.short
vocl> imcopy dev$pix image.short
dev$pix -> image.short
vocl> logout
[joe@big-apple ~]$ ls -l image.short.fits
-rw-rw-r-- 1 joe joe 3196800 6月 29 23:11 image.short.fits