IIRC this is a known problem with 5.1 and El Capitan…
http://discourse.mcneel.com/t/unable-to-copy-the-default-command-set/26340
IIRC this is a known problem with 5.1 and El Capitan…
http://discourse.mcneel.com/t/unable-to-copy-the-default-command-set/26340