diff --git a/clazy.cmake b/clazy.cmake
index c86a889..77a2409 100644
--- a/clazy.cmake
+++ b/clazy.cmake
@@ -1,117 +1,123 @@
 #!/usr/bin/env sh
 
 libdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@
 sharedir=@CMAKE_INSTALL_PREFIX@/@SHARE_INSTALL_DIR@
 
 HELP() {
   echo "Usage: `basename $0` [options] [clang++-options]"
   echo
   echo "Static analyzer for C++/Qt code"
   echo
   echo "Options:"
   echo "  --help             print program help"
   echo "  --version          print the program version"
   echo "  --list             print a list of all available checkers, arranged by level"
   echo "  --explain [regexp] print explanations for the checker matching a regexp"
   echo "or"
   echo "  --explain          print explanations for all checkers"
   echo
   echo "Any of the options above will print the requested information and then exit."
   echo
   echo "Convenience Options:"
   echo "  --qt4compat        Qt4 compatibility mode. useful for source code that can build with Qt4"
   echo "  (this is the same as passing \"-Xclang -plugin-arg-clazy -Xclang qt4-compat\")"
   echo "  --qtdeveloper      Special option for building Qt5 itself resulting in fewer false positives"
   echo "  (this is the same as passing \"-Xclang -plugin-arg-clazy -Xclang qt-developer\")"
   echo
   echo "All other options are passed directly to clang++ and handled from there."
   echo
   echo "See the clang++ manual for a list of the very large set of options available"
   echo
 }
 
 VERSION() {
     echo "clazy version: @CLAZY_PRINT_VERSION@"
     ${CLANGXX:-clang++} --version | head -1 | awk '{printf("clang++ Version: %s\n",$3)}'
 }
 
 PRLIST() {
   echo ""
   echo "Checks from level$1. $2:"
   ls -1 $sharedir/doc/clazy/level$1/README* | awk -F/ '{printf("    %s\n", $NF)}' | sed s/README-// | sed s/\.md$// | sort
 }
 
 PRINFO() {
-  lst=`ls -1 $sharedir/doc/clazy/level*/README*$1* $sharedir/doc/clazy/manuallevel/README*$1*`
-  for f in $lst
-  do
-    l=`echo $f | awk -F/ '{foo=NF-1; printf("    %s:%s\n", $foo,$NF)}'`
-    level=`echo $l | cut -d: -f1`
-    checker=`echo $l | cut -d: -f2 | sed s/README-// | sed s/\.md$//`
-    echo "== Explanation for checker $checker ($level) =="
-    cat $f
-    echo
-  done
+  lst=`ls -1 $sharedir/doc/clazy/level*/README*$1* $sharedir/doc/clazy/manuallevel/README*$1* 2>/dev/null`
+  if ( test ! -z "$lst" )
+  then
+    for f in $lst
+    do
+      l=`echo $f | awk -F/ '{foo=NF-1; printf("    %s:%s\n", $foo,$NF)}'`
+      level=`echo $l | cut -d: -f1`
+      checker=`echo $l | cut -d: -f2 | sed s/README-// | sed s/\.md$//`
+      echo "== Explanation for checker $checker ($level) =="
+      cat $f
+      echo
+    done
+  else
+    echo "There is no explanation available for checker \"$1\""
+    echo "Run 'clazy --explain' to see the list of all available checkers."
+  fi
 }
 
 if ( test $# -gt 0 -a "$1" = "--help" )
 then
   HELP
   exit
 fi
 
 if ( test $# -gt 0 -a "$1" = "--version" )
 then
   VERSION
   exit
 fi
 
 if ( test $# -gt 0 -a "$1" = "--list" )
 then
   echo "List of available clazy checkers:"
   PRLIST 0 "Very stable checks, 100% safe, no false-positives"
   PRLIST 1 "Mostly stable and safe, rare false-positives"
   PRLIST 2 "Sometimes has false-positives (20-30%)"
   PRLIST 3 "Not always correct, high rate of false-positives"
   exit
 fi
 
 if ( test $# -gt 0 -a "$1" = "--explain" )
 then
   shift
   PRINFO $@
   exit
 fi
 
 ExtraClangOptions=""
 if ( test $# -gt 0 -a "$1" = "--qt4compat" )
 then
   shift
   ExtraClangOptions="-Xclang -plugin-arg-clazy -Xclang qt4-compat"
 fi
 if ( test $# -gt 0 -a "$1" = "--qtdeveloper" )
 then
   shift
   ExtraClangOptions="-Xclang -plugin-arg-clazy -Xclang qt-developer"
 fi
 if ( test $# -gt 0 -a "$1" = "--visit-implicit-code" )
 then
   shift
   ExtraClangOptions="-Xclang -plugin-arg-clazy -Xclang visit-implicit-code"
 fi
 
 ClazyPluginLib=ClazyPlugin@CMAKE_SHARED_LIBRARY_SUFFIX@
 
 if ( test -f "$libdir/$ClazyPluginLib" )
 then
     # find plugin libraries in install dir
     export LD_LIBRARY_PATH=$libdir:$LD_LIBRARY_PATH
     export DYLD_LIBRARY_PATH=$libdir:$DYLD_LIBRARY_PATH
 elif ( test -f "$(dirname $0)/lib/$ClazyPluginLib" )
 then
     # find plugin libraries in build dir
     export LD_LIBRARY_PATH=$(dirname $0)/lib:$LD_LIBRARY_PATH
     export DYLD_LIBRARY_PATH=$(dirname $0)/lib:$DYLD_LIBRARY_PATH
 fi
 
 ${CLANGXX:-clang++} -Qunused-arguments -Xclang -load -Xclang $ClazyPluginLib -Xclang -add-plugin -Xclang clazy $ExtraClangOptions "$@"