Informix Error -21537: Defragment: This command cannot be run while a defragmentation is in progress.

Reasons / Common Causes

-21537 fires when a command is run against a partition/dbspace while a defragmentation task is already in progress on it — per the official guidance.

1. A defragmentation task already in progress, per the official guidance — the direct, only cause; certain commands conflict with an active defragment.

Solutions / Resolution

1. Rerun the command after defragmentation completes, per the official guidance.

Examples

N/A

No specific triggering statement is documented beyond a conflicting command run mid- defragment.

Diagnostic Checks

1. Check whether a defragmentation task is currently running, and wait for it to finish before rerunning the command.

Related Errors / Related Topics

• -21533 — "Defragment: A defragmentation task is already in progress on this dbspace." The direct concurrency restriction this error's blocked command runs into.

A command couldn't run because a defragmentation task was in progress — rerun it once defragmentation completes.