Thankyou Uwe.

I already have my library path pointing to the qwt library, so I do not get any such errors. Following the link you suggest I see one option to resolve this should be:

Qt Code: 
  1. # QT_PLUGIN_PATH="/usr/local/qwt-6.0.2-svn/plugins/designer"
  2. # export QT_PLUGIN_PATH
  3. # echo $QT_PLUGIN_PATH
  4. /usr/local/qwt-6.0.2-svn/plugins/designer
  5. # qt
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The last line is how I run qt-creator. It still doesn't see the plugin. I will look into other ways.