Index: openacs-4/packages/acs-tcl/tcl/tcl-documentation-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/tcl-documentation-procs.tcl,v
diff -u -r1.37 -r1.38
--- openacs-4/packages/acs-tcl/tcl/tcl-documentation-procs.tcl	7 Aug 2017 23:48:00 -0000	1.37
+++ openacs-4/packages/acs-tcl/tcl/tcl-documentation-procs.tcl	1 Oct 2017 12:16:05 -0000	1.38
@@ -1204,7 +1204,7 @@
                         #
                         return ""
                     }
-                    ad_log error "problem rendering complain page: $errorMsg ($errorCode)"
+                    ad_log error "problem rendering complain page: $errorMsg ($errorCode) $::errorInfo"
                     set html "Invalid input"
                 }
                 ns_return 422 text/html $html