title: Changing the SDK in WebSphere Application Server 8.5
body: <p>When I try to start the the deployment manager in WebSphere Application Server I'm getting the following error:</p>
  
  <pre class="lang-none prettyprint-override"><code>00000001 SDKUtils       
  A ADML0004E: An exception occurred when attempting to expand variable $(JAVA_HOME) com.ibm.wsspi.runtime.variable.
  UndefinedVariableException: Undefined variable JAVA_HOME
      at com.ibm.ws.runtime.component.VariableMapImpl.expand(VariableMapImpl.j 
  </code></pre>