diff --git a/Manual_tools/scripts/generate_reference_manual/copy_doxygen_latex_doc b/Manual_tools/scripts/generate_reference_manual/copy_doxygen_latex_doc
index 682978f3c64..e7f5c06872b 100755
--- a/Manual_tools/scripts/generate_reference_manual/copy_doxygen_latex_doc
+++ b/Manual_tools/scripts/generate_reference_manual/copy_doxygen_latex_doc
@@ -165,6 +165,11 @@ sub latex_unmangle
     $buf =~ s/ +\n/\n/g;
 
     # Convert buffer back to Doxygen 1.5.5 format
+    # remove nested brackets
+    if ($buf =~ m/\\paragraph\[([^\]]*?)\[[^\[\]]*?\](.*?)\]/)
+    {
+      $buf =~ s/\\paragraph\[([^\]]*?)\[[^\[\]]*?\](.*?)\]/\\paragraph\[$1$2\]/g;
+    }
     $buf =~ s/\\paragraph\[.*?\]/\\paragraph/g; # remove \paragraph[...] -> \paragraph
 
     # Unmangle comma (,), _, ~, <, >, *, &, [] characters mangled for Latex
@@ -200,8 +205,12 @@ sub latex_unmangle
         $buf =~ s/\{\\footnotesize\s+(.*?)\s*\}\\\\/$1/smg;
                                                 # replace {\footnotesize xxx} by xxx
     }
-    #
-    $buf =~ s/\\index\{[^\\]*\}//g;             # remove \index{...}
+    # remove nested braces
+    while ($buf =~ m/\\index\{([^\}]*?)\{[^\{\}]*?\}(.*?)\}/)
+    {
+      $buf =~ s/\\index\{([^\}]*?)\{[^\{\}]*?\}(.*?)\}/\\index\{$1$2\}/g;
+    }
+    $buf =~ s/\\index\{.*?\}//g;             # remove \index{...}
     $buf =~ s/\\setlength\{\\rightskip\}\{0pt plus 5cm\}//g;
                                                 # remove \setlength{\rightskip}{0pt plus 5cm}