diff --git a/tcltk/netgen.tcl.bak b/tcltk/netgen.tcl.bak
deleted file mode 100644
index 78c7afc..0000000
--- a/tcltk/netgen.tcl.bak
+++ /dev/null
@@ -1,535 +0,0 @@
-# Wishrc startup for ToolScript (netgen)
-#
-# For installation:  Put this file and also tclnetgen.so into
-# directory ${CAD_ROOT}/netgen/tcl/, and set the "load" line below
-# to point to the location of tclnetgen.so.  Also see comments
-# in shell script "netgen.sh".
-#
-
-# Check namespaces for existence of other applications
-set UsingMagic 0
-set UsingXCircuit 0
-set UsingIRSIM 0
-set batchmode 0
-set nlist [namespace children]
-foreach i $nlist {
-   switch $i {
-      ::magic { set UsingMagic 1 }
-      ::xcircuit { set UsingXCircuit 1 }
-      ::irsim { set UsingIRSIM 1 }
-   }
-}
-
-if {${tcl_version} >= 8.6} {
-   load -lazy TCL_DIR/tclnetgenSHDLIB_EXT
-} else {
-   load TCL_DIR/tclnetgenSHDLIB_EXT
-}
-
-#----------------------------------------------------------------
-# Convert LVS list result into a JSON file 
-#----------------------------------------------------------------
-
-proc netgen::convert_to_json {filename lvs_final} {
-   set pidx [string last . $filename]
-   set jsonname [string replace $filename $pidx end ".json"]
-   if {![catch {open $jsonname w} fjson]} {
-      # Outer list is of each cell compared
-      foreach circuit $lvs_final {
-	 foreach {key value} $circuit {
-	    puts $fjson "  $key"
-	    switch $key {
-	       name {
-		  set cktval [lindex $value 0]
-		  puts $fjson "    $cktval"
-		  set cktval [lindex $value 1]
-		  puts $fjson "    $cktval"
-	       }
-	       pins {
-		  set cktval [lindex $value 0]
-		  foreach pin $cktval {
-		     puts $fjson "    $pin"
-		  }
-		  set cktval [lindex $value 1]
-		  foreach pin $cktval {
-		     puts $fjson "    $pin"
-		  }
-	       }
-               nets {
-		  set cktval [lindex $value 0]
-		  puts $fjson "    $cktval"
-		  set cktval [lindex $value 1]
-		  puts $fjson "    $cktval"
-               }
-	       devices {
-		  set cktval [lindex $value 0]
-		  foreach dev $cktval {
-		     set devname [lindex $dev 0]
-		     set devnum  [lindex $dev 1]
-		     puts $fjson "    $devname, $devnum"
-		  }
-		  set cktval [lindex $value 1]
-		  foreach dev $cktval {
-		     set devname [lindex $dev 0]
-		     set devnum  [lindex $dev 1]
-		     puts $fjson "    $devname, $devnum"
-		  }
-	       }
-	       goodnets -
-	       badnets {
-		  foreach group $value {
-		     set cktval [lindex $group 0]
-		     foreach net $cktval {
-			set netname [lindex $net 0]
-		        puts $fjson "    $netname"
-			set netconn [lindex $net 1]
-			foreach fanout $netconn {
-			   set devname [lindex $fanout 0]
-			   set pinname [lindex $fanout 1]
-			   set count [lindex $fanout 2]
-		           puts $fjson "      $devname, $pinname, $count"
-			}
-		     }
-		     set cktval [lindex $value 1]
-		     foreach net $cktval {
-			set netname [lindex $net 0]
-		        puts $fjson "    $netname"
-			set netconn [lindex $net 1]
-			foreach fanout $netconn {
-			   set devname [lindex $fanout 0]
-			   set pinname [lindex $fanout 1]
-			   set count [lindex $fanout 2]
-		           puts $fjson "      $devname, $pinname, $count"
-			}
-		     }
-		  }
-	       }
-	       goodelements -
-	       badelements {
-		  foreach group $value {
-		     set cktval [lindex $group 0]
-		     foreach elem $cktval {
-			set instname [lindex $elem 0]
-		        puts $fjson "    $instname"
-			set instpins [lindex $elem 1]
-			foreach fanout $instpins {
-			   set pinname [lindex $fanout 0]
-			   set count [lindex $fanout 1]
-		           puts $fjson "      $pinname, $count"
-			}
-		     }
-		     set cktval [lindex $value 1]
-		     foreach elem $cktval {
-			set instname [lindex $net 0]
-		        puts $fjson "    $instname"
-			set instpins [lindex $net 1]
-			foreach fanout $instpins {
-			   set pinname [lindex $fanout 0]
-			   set count [lindex $fanout 1]
-		           puts $fjson "      $pinname, $count"
-			}
-		     }
-		  }
-	       }
-	       properties {
-		  foreach instance $value {
-		     set instnames [lindex $instance 0]
-		     set instname0 [lindex $instnames 0]
-		     puts $fjson "    $instname0:"
-		     foreach property [lrange $instance 1 end] {
-		        set prop0 [lindex $property 0]
-			set propname [lindex $prop0 0]
-			set propval [lindex $prop0 1]
-		        puts $fjson "      $propname: $propval"
-		     }
-		     set instname1 [lindex $instnames 1]
-		     puts $fjson "    $instname1:"
-		     foreach property [lrange $instance 1 end] {
-		        set prop1 [lindex $property 1]
-			set propname [lindex $prop1 0]
-			set propval [lindex $prop1 1]
-		        puts $fjson "      $propname: $propval"
-		     }
-		  }
-	       }
-	    }
-	 }
-      }
-   }
-   close $fjson
-}
-
-#----------------------------------------------------------------
-# Define the "lvs" command as a way of calling the netgen options
-# for standard compare, essentially the same as the old "netcomp"
-# standalone program.
-#
-# Use the "canonical" command to parse the file and cell names,
-# although if the cells have not been read in yet, then the
-# original syntax of filename or {filename cellname} is required.
-#
-# "args" is passed to verify and may therefore contain only the
-# value "-list" or nothing.  If "-list", then output is returned
-# as a nested list.
-#----------------------------------------------------------------
-
-proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
-   set dolist 0
-   set dojson 0
-   puts stdout "Diagnostic version"
-   foreach arg $args {
-      if {$arg == "-list"} {
-	 puts stdout "Generating list result"
-	 set dolist 1
-	 set lvs_final {}
-      } elseif {$arg == "-json"} {
-	 puts stdout "Generating JSON file result"
-	 set dolist 1
-	 set dojson 1
-	 set lvs_final {}
-      }
-   }
-
-   # Allow name1 or name2 to be a list of {filename cellname},
-   # A single <filename>, or any valid_cellname form if the
-   # file has already been read.
-
-   if {[catch {set flist1 [canonical $name1]}]} {
-      if {[llength $name1] == 2} {
-         set file1 [lindex $name1 0]
-         set cell1 [lindex $name1 1]
-      } else {
-         set file1 $name1
-         set cell1 $name1
-      }
-      puts stdout "Reading netlist file $file1"
-      set fnum1 [netgen::readnet $file1]
-   } else {
-      set cell1 [lindex $flist1 0]
-      set fnum1 [lindex $flist1 1]
-      set flist1 [canonical $fnum1]
-      set file1 [lindex $flist1 0]
-   }
-
-   if {[catch {set flist2 [canonical $name2]}]} {
-      if {[llength $name2] == 2} {
-         set file2 [lindex $name2 0]
-         set cell2 [lindex $name2 1]
-      } else {
-         set file2 $name2
-         set cell2 $name2
-      }
-      puts stdout "Reading netlist file $file2"
-      set fnum2 [netgen::readnet $file2]
-   } else {
-      set cell2 [lindex $flist2 0]
-      set fnum2 [lindex $flist2 1]
-      set flist2 [canonical $fnum2]
-      set file2 [lindex $flist2 0]
-   }
-
-   if {$fnum1 == $fnum2} {
-      puts stderr "Both cells are in the same netlist:  Cannot compare!"
-      return
-   }
-
-   set clist1 [cells list $fnum1]
-   set cidx [lsearch -regexp $clist1 ^$cell1$]
-   if {$cidx < 0} {
-      puts stderr "Cannot find cell $cell1 in file $file1"
-      return
-   } else {
-      set cell1 [lindex $clist1 $cidx]
-   }
-   set clist2 [cells list $fnum2]
-   set cidx [lsearch -regexp $clist2 ^$cell2$]
-   if {$cidx < 0} {
-      puts stderr "Cannot find cell $cell2 in file $file2"
-      return
-   } else {
-      set cell2 [lindex $clist2 $cidx]
-   }
-
-   netgen::compare assign "$fnum1 $cell1" "$fnum2 $cell2"
-
-   if {[file exists $setupfile]} {
-      puts stdout "Reading setup file $setupfile"
-      # Instead of sourcing the setup file, run each line so we can
-      # catch individual errors and not let them halt the LVS process
-      set perrors 0
-      if {![catch {open $setupfile r} fsetup]} {
-	 set sline 0
-	 set command {}
-	 while {[gets $fsetup line] >= 0} {
-	    incr sline
-	    append command $line "\n"
-	    if {[info complete $command]} {
-	       if {[catch {uplevel 1 [list namespace eval netgen $command]} msg]} {
-		  set msg [string trimright $msg "\n"]
-		  puts stderr "Error $setupfile:$sline (ignoring), $msg"
-		  incr perrors
-	       }
-	       set command {}
-	    }
-	 }
-	 close $fsetup
-      } else {
-	 puts stdout "Error:  Cannot read the setup file $setupfile"
-      }
-	
-      if {$perrors > 0} {
-	 puts stdout "Warning:  There were errors reading the setup file"
-      }
-   } else {
-      netgen::permute default	;# transistors and resistors
-      netgen::property default
-   }
-
-   puts stdout "Comparison output logged to file $logfile"
-   netgen::log file $logfile
-   netgen::log start
-   netgen::log echo off
-   if {$dolist == 1} {
-      set endval [netgen::compare -list hierarchical "$fnum1 $cell1" "$fnum2 $cell2"]
-   } else {
-      set endval [netgen::compare hierarchical "$fnum1 $cell1" "$fnum2 $cell2"]
-   }
-   if {$endval == {}} {
-      netgen::log put "No cells in queue!\n"
-      return
-   }
-   set properr {}
-   while {$endval != {}} {
-      if {$dolist == 1} {
-         netgen::run -list converge
-      } else {
-         netgen::run converge
-      }
-      netgen::log echo on
-      if {[verify equivalent]} {
-	 # Resolve automorphisms by pin and property
-	 if {$dolist == 1} {
-            netgen::run -list resolve
-	 } else {
-            netgen::run resolve
-	 }
-	 set uresult [verify unique]
-         if {$uresult == 0} {
-	    netgen::log put "   Networks match locally but not globally.\n"
-	    netgen::log put "   Probably connections are swapped.\n"
-	    netgen::log put "   Check the end of logfile ${logfile} for implicated nodes.\n"
-	    if {$dolist == 1} {
-	       verify -list nodes
-	    } else {
-	       verify nodes
-	    }
-
-	    # Flatten the non-matching subcircuit (but not the top-level cells)
-            if {[netgen::print queue] != {}} {
-	       netgen::log put "  Flattening non-matched subcircuits $endval"
-	       netgen::flatten class "[lindex $endval 0] $fnum1"
-	       netgen::flatten class "[lindex $endval 1] $fnum2"
-	    }
-	 } else {
-	    # Match pins
-            netgen::log echo off
-	    set result [equate pins "$fnum1 [lindex $endval 0]" \
-			"$fnum2 [lindex $endval 1]"]
-	    if {$result != 0} {
-		equate classes "$fnum1 [lindex $endval 0]" \
-			 "$fnum2 [lindex $endval 1]"
-	    }
-            netgen::log echo on
-	 }
-	 if {$uresult == 2} {lappend properr [lindex $endval 0]}
-      } else {
-	 # Flatten the non-matching subcircuit (but not the top-level cells)
-         if {[netgen::print queue] != {}} {
-	    netgen::log put "  Flattening non-matched subcircuits $endval"
-	    netgen::flatten class "[lindex $endval 0] $fnum1"
-	    netgen::flatten class "[lindex $endval 1] $fnum2"
-	 }
-      }
-      netgen::log echo off
-      if {$dolist == 1} {
-         catch {lappend lvs_final $lvs_out}
-         set lvs_out {}
-         set endval [netgen::compare -list hierarchical]
-      } else {
-         set endval [netgen::compare hierarchical]
-      }
-   }
-   netgen::log echo off
-   puts stdout "Result: " nonewline
-   netgen::log echo on
-   verify only
-   if {$properr != {}} {
-      netgen::log put "The following cells had property errors: $properr\n"
-   }
-   netgen::log end
-   puts stdout "LVS Done."
-   if {$dojson == 1} {
-      netgen::convert_to_json $logfile $lvs_final
-   } elseif {$dolist == 1} {
-      return $lvs_final
-   }
-}
-
-# It is important to make sure no netgen commands overlap with Tcl built-in
-# commands, because otherwise the namespace import will fail.
-
-proc pushnamespace { name } {
-
-   set y [namespace eval ${name} info commands ::${name}::*]
-   set z [info commands]
-
-   foreach v $y {
-      regsub -all {\*} $v {\\*} i
-      set x [namespace tail $i]
-      if {[lsearch $z $x] < 0} {
-         namespace import $i
-      } else {
-            puts "Warning: ${name} command '$x' use fully-qualified name '$v'"
-      }
-   }
-}
-
-proc popnamespace { name } {
-   set z [info commands]
-   set l [expr [string length ${name}] + 5]
-
-   while {[set v [lsearch $z ${name}_tcl_*]] >= 0} {
-      set y [lindex $z $v]
-      set w [string range $y $l end]
-      interp alias {} ::$w {}
-      rename ::$y ::$w
-      puts "Info: replacing ::$w with ::$y"
-   }
-   namespace forget ::${name}::*
-}
-
-set auto_noexec 1       ;# don't EVER call UNIX commands w/o "shell" in front
-
-#----------------------------------------------------------------------
-# Cross-Application section
-#----------------------------------------------------------------------
-
-# Setup IRSIM assuming that the Tcl version is installed.
-# We do not need to rename procedure irsim to NULL because it is
-# redefined in a script, which simply overwrites the original.
-
-proc irsim { args } {
-   global CAD_ROOT
-   set irsimscript [glob -nocomplain ${CAD_ROOT}/irsim/tcl/irsim.tcl]
-   if { ${irsimscript} == {} } {
-      puts stderr "\"irsim\" requires Tcl-based IRSIM version 9.6 or newer."
-      puts stderr "Could not find script \"irsim.tcl\".  If IRSIM is installed in a"
-      puts stderr "place other than CAD_ROOT (=${CAD_ROOT}), use the command"
-      puts stderr "\"source <path>/irsim.tcl\" before doing \"irsim\"."
-   } else {
-      source $irsimscript
-      eval {irsim} $args
-   }
-}
-
-# Setup Xcircuit assuming that the Tcl version is installed.
-
-proc xcircuit { args } {
-   global CAD_ROOT
-   global argc
-   global argv
-   set xcircscript [glob -nocomplain ${CAD_ROOT}/xcircuit*/xcircuit.tcl]
-   if { ${xcircscript} == {} } {
-      puts stderr "\"xcircuit\" requires Tcl-based XCircuit version 3.1 or newer."
-      puts stderr "Could not find script \"xcircuit.tcl\".  If XCircuit is installed in a"
-      puts stderr "place other than CAD_ROOT (=${CAD_ROOT}), use the command"
-      puts stderr "\"source <path>/xcircuit.tcl\"."
-   } else {
-      # if there are multiple installed versions, choose the highest version.
-      if {[llength $xcircscript] > 1} {
-        set xcircscript [lindex [lsort -decreasing -dictionary $xcircscript] 0]
-      }
-      set argv $args
-      set argc [llength $args]
-      uplevel #0 source $xcircscript
-   }
-}
-
-# Setup Magic assuming that the Tcl version is installed.
-
-proc magic { args } {
-   global CAD_ROOT
-   global argc
-   global argv
-   set magicscript [glob -nocomplain ${CAD_ROOT}/magic/tcl/magic.tcl]
-   if { ${magicscript} == {} } {
-      puts stderr "\"magic\" requires Tcl-based Magic version 7.2 or newer."
-      puts stderr "Could not find script \"magic.tcl\".  If Magic is installed in a"
-      puts stderr "place other than CAD_ROOT (=${CAD_ROOT}), use the command"
-      puts stderr "\"source <path>/magic.tcl\"."
-   } else {
-      set argv $args
-      set argc [llength $args]
-      uplevel #0 source $magicscript
-   }
-}
-
-#----------------------------------------------------------------------------
-# Have we called netgen from tkcon or a clone thereof?  If so, set NetgenConsole
-#----------------------------------------------------------------------------
-
-if {! $UsingMagic } {
-   if {[lsearch [interp aliases] tkcon] != -1} {
-      set NetgenConsole tkcon
-      wm withdraw .
-   }
-}
-
-pushnamespace netgen
-
-#----------------------------------------------------------------------------
-# For now, if we are standalone, pop down the default Tk window.
-# Sometime later we may wish to provide a standalone GUI frontend in Tk
-# to improve upon the original X11 "xnetgen" frontend.  If so, its
-# definitions would go below.
-
-if {! $UsingMagic } {
-   if {[lsearch [interp aliases] tkcon] != -1} {
-      if {[string range [wm title .] 0 3] == "wish"} {
-	 wm withdraw .
-      }
-   }
-}
-
-#----------------------------------------------------------------------------
-# No-console mode drops "--" in front of the argument list and "-noc"
-# is retained, so remove them.  Internally, the console will be determined
-# by checking for a slave interpreter, so there is no need for any
-# action here other than removing the argument.
-
-if {[lindex $argv 0] == "--"} {
-   incr argc -1
-   set argv [lrange $argv 1 end]
-}
-
-if {[string range [lindex $argv 0] 0 3] == "-noc"} {
-   incr argc -1
-   set argv [lrange $argv 1 end]
-}
-
-if {[string range [lindex $argv 0] 0 3] == "-bat"} {
-   incr argc -1
-   set argv [lrange $argv 1 end]
-   set batchmode 1
-}
-
-#----------------------------------------------------------------------------
-# Anything on the command line is assumed to be a netgen command to evaluate
-
-if {[catch {eval $argv}]} {
-   puts stdout "$errorInfo"
-}
-if {$batchmode == 1} {quit}
-
-#----------------------------------------------------------------------------
-# Netgen start function drops back to interpreter after initialization & setup
diff --git a/tcltk/netgen.tcl.in b/tcltk/netgen.tcl.in
index 0146e8e..a58631e 100644
--- a/tcltk/netgen.tcl.in
+++ b/tcltk/netgen.tcl.in
@@ -200,7 +200,9 @@ proc netgen::convert_to_json {filename lvs_final} {
 	                puts $fjson "        \],"
 		     }
 		  }
-		  puts $fjson "      \]"
+		  if {$glen > 0} {
+		     puts $fjson "      \]"
+		  }
 		  if {$kidx == $nkeys} {
 		     puts $fjson "   \]"
 		  } else {
@@ -279,7 +281,9 @@ proc netgen::convert_to_json {filename lvs_final} {
 	                puts $fjson "        \],"
 		     }
 		  }
-		  puts $fjson "      \]"
+		  if {$glen > 0} {
+		     puts $fjson "      \]"
+		  }
 		  if {$kidx == $nkeys} {
 		     puts $fjson "   \]"
 		  } else {