NMAKE Warning U4010
'target' : build failed; /K specified, continuing ...
A command in the commands block for the given target returned a nonzero exit code. The /K option told NMAKE to continue processing unrelated parts of the build and to issue an exit code 1 when the NMAKE session is finished.
If the given target is, itself, a dependent for another target, NMAKE issues warning U4011 after this warning.