title: I am using ModelSim Altera 10.3d Quartus II 15.0 starter edition. When I open it I get an error message
body: <pre>
  can't read "_clients()": no such variable
      while executing
  "set _currObj $_clients($cid)"
      (object "::.bookmarkmgr" method "::vsimwidgets::bookmarkmgr::_setcurrent" body line 11)
      invoked from within
  "_setcurrent $cid"
      (object "::.bookmarkmgr" method "::vsimwidgets::bookmarkmgr::_menu_prepost" body line 16)
      invoked from within
  "::.bookmarkmgr _menu_prepost .mBar.bookmarks 1 {} 1"
      (in namespace inscope "::vsimwidgets::bookmarkmgr" script line 1)
      invoked from within
  "namespace inscope ::vsimwidgets::bookmarkmgr {::.bookmarkmgr _menu_prepost .mBar.bookmarks 1 {} 1}"
      ("eval" body line 1)
      invoked from within
  "eval $post_cmd"
      (procedure "::Vsimmenu:efaultMenuPostCmd" line 41)
      invoked from within
  "::Vsimmenu:efaultMenuPostCmd .mBar.bookmarks {namespace inscope ::vsimwidgets::bookmarkmgr {::.bookmarkmgr _menu_prepost .mBar.bookmarks 1 {} 1}} Se..."
      (menu preprocess)
  </pre>
  
  <p>How to remove this error</p>