NTSTATUS 0xC0000087 (STATUS_SECTION_NOT

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Windows could not grow the mapped section to the requested size.

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STATUS_INVALID_VOLUME_LABEL	STATUS_NOT_MAPPED_DATA

STATUS_SECTION_NOT_EXTENDED

The existing section cannot be extended under its current backing and state

Extending a section can require increasing its backing file, reserving a larger maximum size, and preserving consistency with existing views. This status reports that the requested extension did not take effect. Common constraints include read-only backing handles, insufficient storage, image-section semantics, or a maximum size fixed at creation.

Growing the file separately does not automatically enlarge an already-created section object. Existing views remain bounded by the section maximum and must often be unmapped and recreated after the file is resized through a supported path.

What to inspect

Record the original section maximum, requested new size, backing-file size, access rights, and file-system result.
Determine whether active views, image mapping attributes, or remote/file-system limitations prohibit extension.
Check disk quota and allocation failures separately from virtual-address reservation failures.
When recreation is required, coordinate all users so no process continues with a stale mapping handle.

References

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