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copied!<p>You're dead right. The <a href="http://msdn.microsoft.com/en-us/library/aa363855%28VS.85%29.aspx" rel="nofollow noreferrer">documentation</a> doesn't even list ERROR_ACCESS_DENIED as a possible error code for that function so it may well be a bug.</p> <p>I would do as you suggest in implementing a retry/backoff strategy.</p> <p>In other words, if you get that error, try again up to three times with no delay (obviously stop at any point here if you get a non-error return code), then up to four more times with delays of (for example, 100 milliseconds, 500 milliseconds, 1 second and 2 seconds).</p> <p>This sort of strategy (which I've used before) usually gets around any temporary resource shortages. If you still can't create the directory after 7 attempts and 3.6<sup>+</sup> seconds, you can probably safely assume it's not going to happen.</p> <p>Your function could be as ugly as (pseudo-code):</p> <pre><code>def createMyDir (dirname): if createDir (dirName) return true; if createDir (dirName) return true; if createDir (dirName) return true; sleep (100) if createDir (dirName) return true; sleep (500) if createDir (dirName) return true; sleep (1000) if createDir (dirName) return true; sleep (2000) return createDir (dirName); </code></pre> <p>but you may want you make it a little more elegant:</p> <pre><code>def createMyDir (dirname): delay = pointer to array [0, 0, 0, 100, 500, 1000, 2000, -1] okay = createDir (dirName) while not okay and [delay] not -1: if [delay] not 0: sleep ([delay]) delay = next delay okay = createDir (dirName) return okay </code></pre>

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