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POGetBinaryType() fails with a last error of ERROR_PARTIAL_COPY
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copied!<p>EDIT:</p> <p>The <code>ERROR_PARTIAL_COPY</code> error was not caused by the call to <code>GetBinaryType()</code> but by an earlier call to <code>EnumProcessModules()</code>, that was attempting to acquire the full path of the executable for a process to pass to <code>GetBinaryType()</code>, that failed. There was exception chaining occurring which I missed and that set the error message of the exception to the same error message in the original post but retained the OS error code of <code>ERROR_PARTIAL_COPY</code>.</p> <hr> <p>This function is called from within a 32-bit Windows Service. I have searched the internet and stackoverflow and found no other instance where <code>GetBinaryType()</code> failed and <code>GetLastError()</code> returned <code>ERROR_PARTIAL_COPY</code>:</p> <blockquote> <p>Only part of a ReadProcessMemory or WriteProcessMemory request was completed.</p> </blockquote> <p>A possibility I considered was that <code>ERROR_PARTIAL_COPY</code> was being set by an earlier WINAPI call and <code>GetBinaryType()</code> does not <code>SetLastError()</code> correctly. I attempted to reproduce this by:</p> <ul> <li>executing it with the path of a file that does not exist</li> <li>executing it with the path of a non-executable file</li> <li>executing it with the path of a file that denies access</li> </ul> <p>with no success (I called <code>SetLastError(ERROR_PARTIAL_COPY);</code> prior to each of the attempts): each of these attempts produced the expected result.</p> <p>The code snippet is:</p> <pre><code>std::string full_exe_path = a_impl->exe_installation_dir + "\\" + a_impl->exe_name; DWORD bin_type; if (FALSE == GetBinaryType(full_exe_path.c_str(), &bin_type)) { throw Base_exception( __LINE__, __FILE__, "Failed to get binary type for " + a_impl->exe_name); // Optional argument here that defaults to GetLastError() } </code></pre> <p>Does anyone know, or have any suggestions, as to the cause of this?</p> <p><em>Note: this is happening on a machine that I do not have access to (and works on over 99% of the machines on which the Windows Service is running)</em></p>

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