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WSAEUSERS
WSAEUSERS reports exhaustion of a user-related quota. The short definition is intentionally broad, so the symbolic name alone does not identify a TCP state, a particular account policy, or a remote server's session counter.
Locate the quota owner
Winsock includes a number of BSD-compatible values, and some defined values are not returned by a core Winsock function. Therefore the first diagnostic step is to record the exact API and service provider that produced the error. A compatibility library or provider can surface a quota condition that is outside the TCP/IP transport itself.
Compare nearby resource errors
WSAEMFILE: too many open sockets.WSAENOBUFS: insufficient buffer space or a full queue.WSAEPROCLIM: an implementation limit on applications using Winsock.ERROR_CONNECTION_COUNT_LIMIT: an explicit concurrent-connection limit for an account.
Collect per-process handle/socket counts, user or job-object limits, provider identity, and the operation rate leading to failure. A successful retry after arbitrary delay is not proof of network recovery; it may simply mean that another object released quota.
Microsoft: Winsock error codes · Microsoft: BSD compatibility and Winsock errors
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