Using robocopy with Visual Studio 2010 Post-build and Pre-build events

Question

Robocopy outputs 1 upon success, unlike most programs that exit with 0 on success. Visual Studio (and MSBUILD) interprets exit code of 1 as an error.

How can Robocopy b

Answer 1

Simply checking for an exit code of 1 is incorrect, as any exit code below 8 is non-erroneous:

Any value greater than 8 indicates that there was at least one failure during the copy operation.

(Just to clarify, an exit code of 8 is an error as well: Several files did not copy)

The proper code, then, should look like this:

IF %ERRORLEVEL% GEQ 8 exit 1
exit 0