Fix wrong serial number management
diff --git a/ChangeLog b/ChangeLog
index 8fc6119..68ced10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 2025-10-24 Massimo Manghi <mxmanghi@apache.org>
-    * doc/rivet.xml.in: reformat and align entities definitions
-    * doc/xml/commands.xml: changed 'inspect' command definition in reference list
+	* doc/rivet.xml.in: reformat and align entities definitions
+	* doc/xml/commands.xml: changed 'inspect' command definition in reference list
+	* rivet/packages/dio/dio_Tdbc.tcl: fix wrong serial number management
 
 2025-10-23 Massimo Manghi <mxmanghi@apache.org>
 	* rivet/packages/dio/formatters.tcl: a typo slipped in and spoiled
diff --git a/rivet/packages/dio/dio_Tdbc.tcl b/rivet/packages/dio/dio_Tdbc.tcl
index 3ab3f77..0e06e80 100644
--- a/rivet/packages/dio/dio_Tdbc.tcl
+++ b/rivet/packages/dio/dio_Tdbc.tcl
@@ -27,7 +27,7 @@
     ::itcl::class Tdbc {
         inherit Database
 
-        private common   connector_n
+        private common   connector_n    -1
         private variable connector
         private variable connector_name
         private variable tdbc_connector
@@ -37,7 +37,6 @@
                                               -timeout]
 
         constructor {interface_name args} {eval configure -interface $interface_name $args} {
-            set connector_n -1
             set connector   ""
 
             # I should check this one: we only accept connector
@@ -100,7 +99,6 @@
 
             if {$clientargs != ""} { lappend connector_cmd {*}$clientargs }
 
-            #puts "evaluating $connector_cmd"
             set connector [eval $connector_cmd]
             incr connector_n
         }
@@ -311,7 +309,7 @@
             # errorinfo is a public variable of the parent class Database.
             # Not a good object design practice
 
-            if {[catch {set tdbc_result [uplevel 1 $tdbc_statement execute]} errorinfo]} {
+            if {[catch {set tdbc_result [uplevel 1 $tdbc_statement execute]} e errorinfo]} {
                 set result_obj [$this result TDBC -error 1 -errorinfo [::list $errorinfo] -isselect false]
             } else {
 
@@ -356,8 +354,8 @@
             Result::destroy
         }
 
-        public method current_row {} {return $rowid}
-        public method cached_results {} {return $cached_rows}
+        public method current_row {} { return $rowid }
+        public method cached_results {} { return $cached_rows }
 
         public method nextrow {} {
             if {[llength $cached_rows] == 0} {