Error occured while performing nmConnect : Cannot connect to Node Manager. : Configuration error while reading domain directory
Solution: locate all nm_password.properties in your domains, and enter
username=bla
password=bla
where bla/bla correspond to your nodemanager username - typically weblogic_n - not to WLS username
Also, make sure your nodemanager.domains file contain the entry
domainname=domainpath
see also http://www.javamonamour.org/2011/08/nmconnect-weblogicnodemanagernmexceptio.html