Oops! An exception occured

exception 'jtException' with message 'ImageCache::getSized() - File "assets/user/images/gallery/1344445649_dsc00334.jpg" does not exist' in /home/westmidl/public_html/system/libraries/ImageCache.php:173
Stack trace:
#0 /home/westmidl/public_html/system/models/Gallery/Image.php(119): ImageCache->getSized('assets/user/ima...', 150, 100)
#1 /home/westmidl/public_html/system/views/content/features/gallery/index.php(17): Gallery_Image->getSizedImageUrl(150, 100)
#2 /home/westmidl/public_html/system/libraries/View.php(117): include('/home/westmidl/...')
#3 /home/westmidl/public_html/system/libraries/HTMLView.php(217): View->render(true, true)
#4 /home/westmidl/public_html/system/models/Content/Feature/Gallery.php(45): HTMLView->render(true, true)
#5 /home/westmidl/public_html/system/models/Content/Item.php(385): Content_Feature_Gallery->render()
#6 /home/westmidl/public_html/system/models/Content/Item.php(373): Content_Item->renderFeatures(Array)
#7 /home/westmidl/public_html/system/libraries/Content/Controller.php(155): Content_Item->render(Array)
#8 [internal function]: Content_Controller->execute(Array, 'empty')
#9 /home/westmidl/public_html/system/core/Jt.php(473): call_user_func_array(Array, Array)
#10 /home/westmidl/public_html/system/core/Jt.php(388): Jt::dispatch()
#11 /home/westmidl/public_html/system/core/Bootstrap.php(24): Jt::run()
#12 /home/westmidl/public_html/index.php(38): require('/home/westmidl/...')
#13 {main}