0018 Cannot convert 4.x domain to primary in 5.x system
Source
GroupWise* Administrator; database management.

Explanation
You cannot convert a GroupWise 4.x secondary domain into the primary domain in a GroupWise 5* system.

Action(s)
Migrate the GroupWise 4.x domain to GroupWise 5. Look up "migration, migrating GroupWise" in GroupWise Administrator Help, then display Migrate GroupWise 4.1 to 5. Then make it the primary domain. Look up "converting domains" in GroupWise Administrator Help.

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