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COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET
COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET is the failure HRESULT 0x80110816 (signed decimal -2146367466, unsigned decimal 2148599830). Its severity bit is 1, facility is 17 (FACILITY_ITF), and the facility-specific code field is 0x0816.
Default-partition invariant for a partition set: exact meaning of COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET
COM+ rejected a partition-set configuration because its default partition is outside the set. Activation cannot use a default that the user’s partition set does not contain.
AllStat records the Windows SDK description as “The partition specified as default is not a member of the partition set.”
Where COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET occurs
The invariant is checked while creating or updating partition-set membership/default properties. The partition and set can each be valid individually while their relationship is invalid.
Typical cause branches
- the default partition was removed from the set but the default property was not changed.
- automation assigns the default before adding membership in the same deployment sequence.
- IDs from different partition sets or catalog servers were mixed.
- a concurrent administrator changed set membership after it was populated.
Diagnostic sequence for COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET
- repopulate the set and resolve all member IDs.
- verify the proposed default is a current member and is valid for the target server.
- add membership before assigning the default, or choose an existing member.
- save the relationship as one coherent change and repopulate.
- test activation for representative users mapped to the set.
Evidence to collect before changing the catalog
- partition-set ID, default-partition ID, full current membership, and catalog server.
- pending property values and operation ordering.
- user mappings that depend on the set and their effective activation partition.
- concurrent partition/set modifications and ErrorInfo entries.
Practical administration scenario
A script removes an old tenant partition from a set and then saves without first selecting another member as the default.
Difference from nearby COMADMIN results
COMADMIN_E_USER_IN_SET concerns duplicate user assignment; COMADMIN_E_BASEPARTITION_REQUIRED_IN_SET concerns the mandatory base partition. This value is solely the default-within-membership rule.
Retry and recovery
Retry after membership and default are consistent. Repeating only the default assignment cannot repair an absent membership.
What this HRESULT does not establish
The error does not mean that the default partition itself is globally invalid. It may be a valid partition that simply is not in this set.
Developer and operations guidance
Log set ID, default ID, ordered member IDs, server, affected user mappings, pending operation sequence, and final committed relationship.
Official Microsoft references for COMADMIN_E_DEFAULT_PARTITION_NOT_IN_SET
- Microsoft: COMADMIN error codes
- Microsoft: default partitions
- Microsoft: what COM+ partitions are
- Microsoft: managing local partitions
- Microsoft: partition implementation
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