Werk #2555: Availability: Fixed exception when trying to group BI aggregations by host/service-groups

Component	User interface
Title	Availability: Fixed exception when trying to group BI aggregations by host/service-groups
Date	Sep 3, 2015
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.6p11 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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