title: Service unavailable error while building using Maven
body: <p>I am a newbie to Maven.
  First time I run the <code>mvn clean install</code> command and it gave me the below error:</p>
  
  <blockquote>
    <p>[ERROR]     Non-resolvable parent POM: Could not transfer artifact
    com.sybase365.mobiliser:mobiliser-parent:pom:4.6.0-RC02 from/to repo
    (<a href="http://orinoco.sybase.com/nexus/content/groups/public-devel" rel="nofollow">http://orinoco.sybase.com/nexus/content/groups/public-devel</a>): Failed
    to transfer file:
    <a href="http://orinoco.sybase.com/nexus/content/groups/public-devel/com/sybase365/mobiliser/mobiliser-parent/4.6.0-RC02/mobiliser-parent-4.6.0-RC02.pom" rel="nofollow">http://orinoco.sybase.com/nexus/content/groups/public-devel/com/sybase365/mobiliser/mobiliser-parent/4.6.0-RC02/mobiliser-parent-4.6.0-RC02.pom</a>.
    Return code is: 503, ReasonPhrase:Service Temporarily Unavailable. and
    'parent.relativePath' points at wrong local POM @ line 3, column 11 -></p>
  </blockquote>
  
  <p>How do I resolve this error?</p>