For those who can't print to redirected printer here my workaround.
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On X2Go Server do following (by root):
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cd /usr/bin
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mv x2goprint x2goprint.orig
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cat << EOF >šx2goprint
#!/bin/bash
umount /tmp
x2goprint.orig $@
EOF
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chmod a+xšx2goprint
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The problem is that CUPS remounts /tmp during print process.
Therefore temporary x2go directories have become unavailable.
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Best regards,
Inpos.