NTSTATUS 0xC0000201 (STATUS_NETWORK_OPEN

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Server policy restricts opening the requested network resource.

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STATUS_CPU_SET_INVALID	STATUS_NO_USER_SESSION_KEY

STATUS_NETWORK_OPEN_RESTRICTION

STATUS_NETWORK_OPEN_RESTRICTION is narrower than an ordinary access denial. The remote open failed because a restriction that governs network opens was not satisfied. It therefore directs diagnosis to the server policy and the open context, not simply to the spelling of the path.

How to narrow it down

Capture the open disposition, share mode, desired access, session identity, existing opens and any server policy relevant to the share. In SMB workloads, a failed create/open can depend on share settings, exclusive-open restrictions, handle state, security requirements or server-specific policy.

Do not assume that granting broader file permissions will solve it. A network-open restriction can remain in place even when the caller has the necessary file-system rights.

Evidence that matters

Record the exact open semantics: access, sharing flags, disposition and target path.
Compare the request with an existing successful open to the same share.
Inspect server policy and conflicting existing handles before changing ACLs.

References

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