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Home/ Questions/Q 153129
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Asked: May 11, 20262026-05-11T09:44:47+00:00 2026-05-11T09:44:47+00:00

I am troubleshooting Microsoft’s FTP server (IIS 6.0) at a client site. In the

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I am troubleshooting Microsoft’s FTP server (IIS 6.0) at a client site. In the FTP log, there’s a few response codes that I’d like to know the meaning of.

For instance, in the line:

12:01:15 10.4.152.122 [194326]created x.jpg 550 1450

I’d like to know the meaning of 1450. There’s other ones as well, like 550 2, and 550 32.

Anyone know of a site or reference that has the meaning of these sub-codes (not sure what the correct term is)?

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  1. 2026-05-11T09:44:48+00:00Added an answer on May 11, 2026 at 9:44 am

    The 450 / 550 values are both from RFC 959.

    As 450 and 550 are both FTP errors, the second values might correspond to Windows error codes. The page here is consistent with that, with values 2, 32, and 1450 all relating to file I/O errors.

    2 = ERROR_FILE_NOT_FOUND

    • The system cannot find the file specified.

    32 = ERROR_SHARING_VIOLATION

    • The process cannot access the file because it is being used by another process.

    1450 = ERROR_NO_SYSTEM_RESOURCES – Insufficient system resources exist to complete the requested service.

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