d as an integer"]</li>   
  <li>[struct stat="ERROR", msg="Cannot open status file: <i>statusfile</i>"]</li>   
  <li>[struct stat="ERROR", msg="Failed to open output <i>filename</i>"]</li>   
  <li>[struct stat="ERROR", msg="Invalid image metadata file: <i>filename</i>"]</li>   
  <li>[struct stat="ERROR", msg="Need columns: cntr nl ns crpix1 crpix2 in image info file"] <span class="explanation">(columns missing from image metadata table)</span></li>   
  <li>[struct stat="ERROR", msg="malloc() failed (Img