title: stsadm -addsolution "Object reference not set to an instance of an object"
body: <p>I am trying to deploy sharepoint webpart. Till executig in command prompt following command:</p>
  
  <pre><code>stsadm -o addsolution -filename {WSPFILENAME}
  </code></pre>
  
  <p>getting alway follow error: <strong>"Object reference not set to an instance of an object"</strong>
  no idea why. wspfilename is correct.
  please help</p>