Index: openacs-4/packages/search/tcl/search-convert-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/search/tcl/search-convert-procs.tcl,v
diff -u -N -r1.4.2.1 -r1.4.2.2
--- openacs-4/packages/search/tcl/search-convert-procs.tcl	12 Sep 2015 19:00:45 -0000	1.4.2.1
+++ openacs-4/packages/search/tcl/search-convert-procs.tcl	11 Feb 2017 17:54:05 -0000	1.4.2.2
@@ -22,6 +22,13 @@
     @creation-date 2005-06-25
 } {
 
+    if {[file size $filename] == 0} {
+        #
+        # Some conversion programs choke on empty content
+        #
+        return ""
+    }
+
     set tmp_filename [ad_tmpnam]
     set result ""
 
@@ -39,7 +46,7 @@
             set convert_command {catppt $filename >$tmp_filename}
         }
         application/pdf {
-            set convert_command {pdftotext $filename $tmp_filename}
+            set convert_command {pdftotext -q $filename $tmp_filename}
         }
         application/vnd.oasis.opendocument.text -
         application/vnd.oasis.opendocument.text-template -
@@ -80,7 +87,6 @@
     if {[catch {eval exec $convert_command} err]} {
         catch {file delete $tmp_filename}
         ns_log Error "SEARCH: conversion failed - $convert_command: $err"
-        file delete $tmp_filename
         return
     }