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The return code from Robocopy is a bit map, defined as follows:

0×10 Serious error. Robocopy did not copy any files. This is either a usage error or an error due to insufficient access privileges on the source or destination directories.
0×08 Some files or directories could not be copied (copy errors occurred and the retry limit was exceeded). Check these errors further.
0×04 Some Mismatched files or directories were detected. Examine the output log. Housekeeping is probably necessary.
0×02 Some Extra files or directories were detected. Examine the output log. Some housekeeping may be needed.
0×01 One or more files were copied successfully (that is, new files have arrived).
0×00 No errors occurred, and no copying was done. The source and destination directory trees are completely synchronized.

You can use this information in a batch file to report the most serious anomalies, as follows:

if errorlevel 16 echo ***FATAL ERROR*** & goto end
if errorlevel 8 echo **FAILED COPIES** & goto end
if errorlevel 4 echo *MISMATCHES* & goto end
if errorlevel 2 echo EXTRA FILES & goto end
if errorlevel 1 echo Copy successful & goto end
if errorlevel 0 echo –no change– & goto end
:end

Alternatively, full details of the return code could be reported as follows:

if errorlevel 16 echo ***FATAL ERROR*** & goto end
if errorlevel 15 echo FAIL MISM XTRA COPY & goto end
if errorlevel 14 echo FAIL MISM XTRA & goto end
if errorlevel 13 echo FAIL MISM COPY & goto end
if errorlevel 12 echo FAIL MISM & goto end
if errorlevel 11 echo FAIL XTRA COPY & goto end
if errorlevel 10 echo FAIL XTRA & goto end
if errorlevel 9 echo FAIL COPY & goto end
if errorlevel 8 echo FAIL & goto end
if errorlevel 7 echo MISM XTRA COPY & goto end
if errorlevel 6 echo MISM XTRA & goto end
if errorlevel 5 echo MISM COPY & goto end
if errorlevel 4 echo MISM & goto end
if errorlevel 3 echo XTRA COPY & goto end
if errorlevel 2 echo XTRA & goto end
if errorlevel 1 echo COPY & goto end
if errorlevel 0 echo –no change– & goto end
:end

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