illumos gate

open_brand fails with a rather generic looking error message if the config.xml file for your brand does not pass validation by xmlValidateDocument:

andy@openindiana:~/Projects/illumos-gate$ zonecfg -z glibc
glibc: No such zone configured
Use 'create' to begin configuring a new zone.
zonecfg:glibc> create
zonecfg:glibc> set brand=glibc
zonecfg:glibc> set zonepath=/opt/glibc-zone
zonecfg:glibc> verify
glibc: unknown brand.

glibc: Invalid document
zonecfg:glibc> exit