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0x00001B63

ERROR_CTX_MODEM_RESPONSE_ERROR

The modem did not accept the command sent to it. Verify that the configured modem name matches the attached modem.

win32decimal 7011

Matched as: the code as given (hex)

Log a case with no specific solution
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Source: System Error Codes (6000-8199) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09