diff --git a/site_ansto/instrument/config/environment/sct_hiden_xcs.tcl b/site_ansto/instrument/config/environment/sct_hiden_xcs.tcl
index a886da16..3fffc2fc 100644
--- a/site_ansto/instrument/config/environment/sct_hiden_xcs.tcl
+++ b/site_ansto/instrument/config/environment/sct_hiden_xcs.tcl
@@ -34,6 +34,7 @@ proc ::scobj::hiden_xcs::checklimits {tc_root} {
       # upperlimit not set, use target
       set hilimit [sct target]
     }
+# hook code goes here
     if { ${setpoint} < ${lolimit} || ${setpoint} > ${hilimit} } {
       sct driving 0
       error "setpoint ${setpoint} violates limits (${lolimit}..${hilimit}) on [sct]"
@@ -60,6 +61,7 @@ proc ::scobj::hiden_xcs::checkrange {tc_root} {
       # upperlimit not set, use target
       set hilimit [sct target]
     }
+# hook code goes here
     if { ${setpoint} < ${lolimit} || ${setpoint} > ${hilimit} } {
       error "setpoint ${setpoint} violates limits (${lolimit}..${hilimit}) on [sct]"
     }
@@ -71,6 +73,7 @@ proc ::scobj::hiden_xcs::checkrange {tc_root} {
 # checkstatus function for driveable interface
 proc ::scobj::hiden_xcs::checkstatus {tc_root} {
   set catch_status [ catch {
+# hook code goes here
     if {[sct driving]} {
       set sp "[sct target]"
       set pv "[hval ${tc_root}/[sct driveable]]"
@@ -136,15 +139,7 @@ proc ::scobj::hiden_xcs::fetch_flow {tc_root nextState cmd_str} {
   sct targets ${targets}
   if { [hpropexists [sct] target] } {
     set pid [pid_flow ${tc_root} [sct target] ${data}]
-    foreach node [list analog/sp1 analog/sp2] {
-      hsetprop ${path}/${node} bias_flow ${pid}
-      if { [hpropexists ${path}/${node} target] } {
-        hset ${path}/${node} [hgetpropval ${path}/${node} target]
-      } else {
-        hset ${path}/${node} [hval ${path}/${node}]
-      }
-    }
-  }
+# cut this function short
   return ${nextState}
 # hook code ends
     if { [hpropexists [sct] geterror] } {
@@ -166,6 +161,7 @@ proc ::scobj::hiden_xcs::getValue {tc_root nextState cmd_str} {
       hdelprop [sct] geterror
     }
     set cmd "${cmd_str}"
+# hook code goes here
     debug_log 1 "getValue sct send ${cmd}"
     sct send "${cmd}"
     return ${nextState}
@@ -178,6 +174,7 @@ proc ::scobj::hiden_xcs::halt {tc_root} {
   set catch_status [ catch {
     debug_log 1 "halt tc_root=${tc_root} sct=[sct] driving=[sct driving]"
     ### TODO hset [sct] [hval [sct]]
+# hook code goes here
     sct driving 0
     return "idle"
   } catch_message ]
@@ -188,6 +185,7 @@ proc ::scobj::hiden_xcs::halt {tc_root} {
 proc ::scobj::hiden_xcs::noResponse {tc_root} {
   set catch_status [ catch {
     debug_log 1 "noResponse tc_root=${tc_root} sct=[sct] resp=[sct result]"
+# hook code goes here
     return "idle"
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}
@@ -210,6 +208,18 @@ proc ::scobj::hiden_xcs::pid_flow {tc_root sp pv} {
     }
     set i_value [expr [sct pid_ivalue] * [sct pid_integ]]
     set pid [expr ${p_value} + ${i_value} + ${d_value}]
+# hook code starts
+  set path [pathname [sct]]
+    foreach node [list analog/sp1 analog/sp2] {
+      hsetprop ${path}/${node} bias_flow ${pid}
+      if { [hpropexists ${path}/${node} target] } {
+        hset ${path}/${node} [hgetpropval ${path}/${node} target]
+      } else {
+        hset ${path}/${node} [hval ${path}/${node}]
+      }
+    }
+  }
+# hook code ends
     sct pid_output ${pid}
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}
@@ -233,6 +243,21 @@ proc ::scobj::hiden_xcs::pid_humidity {tc_root sp pv} {
     }
     set i_value [expr [sct pid_ivalue] * [sct pid_integ]]
     set pid [expr ${p_value} + ${i_value} + ${d_value}]
+# hook code starts
+    set path [pathname [sct]]
+    set sign 1
+    foreach node [list analog/sp1 analog/sp2] {
+      set sign [expr -${sign}]
+      set signed_pid [expr ${sign} * ${pid}]
+      hsetprop ${path}/${node} bias_humidity ${signed_pid}
+      if { [hpropexists ${path}/${node} target] } {
+        hset ${path}/${node} [hgetpropval ${path}/${node} target]
+      } else {
+        hset ${path}/${node} [hval ${path}/${node}]
+      }
+    }
+  }
+# hook code ends
     sct pid_output ${pid}
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}
@@ -253,6 +278,7 @@ proc ::scobj::hiden_xcs::rdValue {tc_root} {
       sct geterror "${data}"
       error "[sct geterror]"
     }
+# hook code goes here
     if { ${data} != [sct oldval] } {
       debug_log 1 "[sct] changed to new:${data}, from old:[sct oldval]"
       sct oldval ${data}
@@ -295,17 +321,6 @@ proc ::scobj::hiden_xcs::read_all_data {tc_root} {
   }
   if { [hpropexists [sct] target] } {
     set pid [pid_humidity ${tc_root} [sct target] ${data}]
-    set path [pathname [sct]]
-    foreach node [list analog/sp1 analog/sp2] {
-      set pid [expr -${pid}]
-      hsetprop ${path}/${node} bias_humidity ${pid}
-      if { [hpropexists ${path}/${node} target] } {
-        hset ${path}/${node} [hgetpropval ${path}/${node} target]
-      } else {
-        hset ${path}/${node} [hval ${path}/${node}]
-      }
-    }
-  }
 # hook code ends
     if { [hpropexists [sct] geterror] } {
       debug_log 1 "[sct] error: [sct geterror]"
@@ -377,6 +392,7 @@ proc ::scobj::hiden_xcs::read_flow {tc_root} {
       sct geterror "${data}"
       error "[sct geterror]"
     }
+# hook code goes here
     if { ${data} != [sct oldval] } {
       debug_log 1 "[sct] changed to new:${data}, from old:[sct oldval]"
       sct oldval ${data}
@@ -499,6 +515,7 @@ proc ::scobj::hiden_xcs::setValue {tc_root nextState cmd_str} {
     }
     set par [sct target]
     set cmd "${cmd_str}${par}"
+# hook code goes here
     if { [hpropexists [sct] driving] } {
       if { [hpropexists [sct] writestatus] && [sct writestatus] == "start" } {
         sct driving 1
@@ -522,6 +539,7 @@ proc ::scobj::hiden_xcs::write_digital {tc_root nextState cmd_str} {
     }
     set par [sct target]
     set cmd "${cmd_str}${par}"
+# hook code goes here
     if { [hpropexists [sct] driving] } {
       if { [hpropexists [sct] writestatus] && [sct writestatus] == "start" } {
         sct driving 1
@@ -694,6 +712,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/enabled klass "environment"
     hsetprop ${scobj_hpath}/enabled sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/enabled type "part"
+    hsetprop ${scobj_hpath}/enabled nxalias "${name}_enabled"
 
     hfactory ${scobj_hpath}/flow plain user float
     hsetprop ${scobj_hpath}/flow read ${ns}::fetch_flow ${scobj_hpath} read_flow {None}
@@ -724,6 +743,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/flow pid_pvalue "0.2"
     hsetprop ${scobj_hpath}/flow sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/flow type "drivable"
+    hsetprop ${scobj_hpath}/flow nxalias "${name}_flow"
 
     hfactory ${scobj_hpath}/flow1 plain user float
     hsetprop ${scobj_hpath}/flow1 control false
@@ -734,6 +754,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/flow1 klass "environment"
     hsetprop ${scobj_hpath}/flow1 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/flow1 type "part"
+    hsetprop ${scobj_hpath}/flow1 nxalias "${name}_flow1"
 
     hfactory ${scobj_hpath}/flow2 plain user float
     hsetprop ${scobj_hpath}/flow2 control false
@@ -744,6 +765,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/flow2 klass "environment"
     hsetprop ${scobj_hpath}/flow2 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/flow2 type "part"
+    hsetprop ${scobj_hpath}/flow2 nxalias "${name}_flow2"
 
     hfactory ${scobj_hpath}/flow3 plain user float
     hsetprop ${scobj_hpath}/flow3 control false
@@ -754,6 +776,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/flow3 klass "environment"
     hsetprop ${scobj_hpath}/flow3 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/flow3 type "part"
+    hsetprop ${scobj_hpath}/flow3 nxalias "${name}_flow3"
 
     hfactory ${scobj_hpath}/gas_factor plain user float
     hsetprop ${scobj_hpath}/gas_factor control true
@@ -765,6 +788,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/gas_factor klass "environment"
     hsetprop ${scobj_hpath}/gas_factor sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/gas_factor type "part"
+    hsetprop ${scobj_hpath}/gas_factor nxalias "${name}_gas_factor"
 
     hfactory ${scobj_hpath}/humidity plain user float
     hsetprop ${scobj_hpath}/humidity read ${ns}::getValue ${scobj_hpath} read_all_data {?ALL DATA}
@@ -796,6 +820,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/humidity pid_pvalue "0.2"
     hsetprop ${scobj_hpath}/humidity sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/humidity type "drivable"
+    hsetprop ${scobj_hpath}/humidity nxalias "${name}_humidity"
 
     hfactory ${scobj_hpath}/temperature plain user float
     hsetprop ${scobj_hpath}/temperature control false
@@ -806,6 +831,7 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/temperature klass "environment"
     hsetprop ${scobj_hpath}/temperature sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/temperature type "part"
+    hsetprop ${scobj_hpath}/temperature nxalias "${name}_temperature"
 
     hsetprop ${scobj_hpath} data "true"
     hsetprop ${scobj_hpath} nxsave "true"
@@ -832,8 +858,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/ansto_temp nxsave false
     hsetprop ${scobj_hpath}/analog/ansto_temp oldval 0.0
     hsetprop ${scobj_hpath}/analog/ansto_temp base "0"
+    hsetprop ${scobj_hpath}/analog/ansto_temp sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/ansto_temp span "100"
     hsetprop ${scobj_hpath}/analog/ansto_temp type "part"
+    hsetprop ${scobj_hpath}/analog/ansto_temp nxalias "${name}_analog_ansto_temp"
 
     hfactory ${scobj_hpath}/analog/pv1 plain user float
     hsetprop ${scobj_hpath}/analog/pv1 read ${ns}::getValue ${scobj_hpath} read_sixteen {?AIN,0}
@@ -844,8 +872,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/pv1 nxsave false
     hsetprop ${scobj_hpath}/analog/pv1 oldval 0.0
     hsetprop ${scobj_hpath}/analog/pv1 base "0"
+    hsetprop ${scobj_hpath}/analog/pv1 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/pv1 span "500"
     hsetprop ${scobj_hpath}/analog/pv1 type "part"
+    hsetprop ${scobj_hpath}/analog/pv1 nxalias "${name}_analog_pv1"
 
     hfactory ${scobj_hpath}/analog/pv2 plain user float
     hsetprop ${scobj_hpath}/analog/pv2 read ${ns}::getValue ${scobj_hpath} read_sixteen {?AIN,1}
@@ -856,8 +886,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/pv2 nxsave false
     hsetprop ${scobj_hpath}/analog/pv2 oldval 0.0
     hsetprop ${scobj_hpath}/analog/pv2 base "0"
+    hsetprop ${scobj_hpath}/analog/pv2 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/pv2 span "500"
     hsetprop ${scobj_hpath}/analog/pv2 type "part"
+    hsetprop ${scobj_hpath}/analog/pv2 nxalias "${name}_analog_pv2"
 
     hfactory ${scobj_hpath}/analog/pv3 plain user float
     hsetprop ${scobj_hpath}/analog/pv3 read ${ns}::getValue ${scobj_hpath} read_sixteen {?AIN,2}
@@ -868,8 +900,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/pv3 nxsave false
     hsetprop ${scobj_hpath}/analog/pv3 oldval 0.0
     hsetprop ${scobj_hpath}/analog/pv3 base "0"
+    hsetprop ${scobj_hpath}/analog/pv3 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/pv3 span "500"
     hsetprop ${scobj_hpath}/analog/pv3 type "part"
+    hsetprop ${scobj_hpath}/analog/pv3 nxalias "${name}_analog_pv3"
 
     hfactory ${scobj_hpath}/analog/rhsense plain user float
     hsetprop ${scobj_hpath}/analog/rhsense read ${ns}::getValue ${scobj_hpath} read_sixteen {?AIN,9}
@@ -880,8 +914,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/rhsense nxsave false
     hsetprop ${scobj_hpath}/analog/rhsense oldval 0.0
     hsetprop ${scobj_hpath}/analog/rhsense base "0"
+    hsetprop ${scobj_hpath}/analog/rhsense sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/rhsense span "100"
     hsetprop ${scobj_hpath}/analog/rhsense type "part"
+    hsetprop ${scobj_hpath}/analog/rhsense nxalias "${name}_analog_rhsense"
 
     hfactory ${scobj_hpath}/analog/rhtemp plain user float
     hsetprop ${scobj_hpath}/analog/rhtemp read ${ns}::getValue ${scobj_hpath} read_sixteen {?AIN,8}
@@ -892,8 +928,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/rhtemp nxsave false
     hsetprop ${scobj_hpath}/analog/rhtemp oldval 0.0
     hsetprop ${scobj_hpath}/analog/rhtemp base "0"
+    hsetprop ${scobj_hpath}/analog/rhtemp sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/rhtemp span "100"
     hsetprop ${scobj_hpath}/analog/rhtemp type "part"
+    hsetprop ${scobj_hpath}/analog/rhtemp nxalias "${name}_analog_rhtemp"
 
     hfactory ${scobj_hpath}/analog/sp1 plain user float
     hsetprop ${scobj_hpath}/analog/sp1 read ${ns}::getValue ${scobj_hpath} read_twelve {?AOUT,0}
@@ -907,8 +945,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/sp1 nxsave false
     hsetprop ${scobj_hpath}/analog/sp1 oldval 0.0
     hsetprop ${scobj_hpath}/analog/sp1 base "0"
+    hsetprop ${scobj_hpath}/analog/sp1 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/sp1 span "500"
     hsetprop ${scobj_hpath}/analog/sp1 type "part"
+    hsetprop ${scobj_hpath}/analog/sp1 nxalias "${name}_analog_sp1"
 
     hfactory ${scobj_hpath}/analog/sp2 plain user float
     hsetprop ${scobj_hpath}/analog/sp2 read ${ns}::getValue ${scobj_hpath} read_twelve {?AOUT,1}
@@ -922,8 +962,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/sp2 nxsave false
     hsetprop ${scobj_hpath}/analog/sp2 oldval 0.0
     hsetprop ${scobj_hpath}/analog/sp2 base "0"
+    hsetprop ${scobj_hpath}/analog/sp2 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/sp2 span "500"
     hsetprop ${scobj_hpath}/analog/sp2 type "part"
+    hsetprop ${scobj_hpath}/analog/sp2 nxalias "${name}_analog_sp2"
 
     hfactory ${scobj_hpath}/analog/sp3 plain user float
     hsetprop ${scobj_hpath}/analog/sp3 read ${ns}::getValue ${scobj_hpath} read_twelve {?AOUT,2}
@@ -937,8 +979,10 @@ proc ::scobj::hiden_xcs::mk_sct_hiden_xcs { sct_controller name tol } {
     hsetprop ${scobj_hpath}/analog/sp3 nxsave false
     hsetprop ${scobj_hpath}/analog/sp3 oldval 0.0
     hsetprop ${scobj_hpath}/analog/sp3 base "0"
+    hsetprop ${scobj_hpath}/analog/sp3 sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/analog/sp3 span "500"
     hsetprop ${scobj_hpath}/analog/sp3 type "part"
+    hsetprop ${scobj_hpath}/analog/sp3 nxalias "${name}_analog_sp3"
 
     if {[SplitReply [environment_simulation]]=="false"} {
       ${sct_controller} poll ${scobj_hpath}/analog/ansto_temp 5
diff --git a/site_ansto/instrument/config/environment/sct_isotech_ps.tcl b/site_ansto/instrument/config/environment/sct_isotech_ps.tcl
index ba956fb7..7c03d55c 100644
--- a/site_ansto/instrument/config/environment/sct_isotech_ps.tcl
+++ b/site_ansto/instrument/config/environment/sct_isotech_ps.tcl
@@ -34,6 +34,7 @@ proc ::scobj::isotech_ps::checkrange {tc_root} {
       # upperlimit not set, use target
       set hilimit [sct target]
     }
+# hook code goes here
     if { ${setpoint} < ${lolimit} || ${setpoint} > ${hilimit} } {
       error "setpoint ${setpoint} violates limits (${lolimit}..${hilimit}) on [sct]"
     }
@@ -50,6 +51,7 @@ proc ::scobj::isotech_ps::getValue {tc_root nextState cmd_str} {
       hdelprop [sct] geterror
     }
     set cmd "${cmd_str}"
+# hook code goes here
     debug_log 1 "getValue sct send ${cmd}"
     sct send "${cmd}"
     return ${nextState}
@@ -61,6 +63,7 @@ proc ::scobj::isotech_ps::getValue {tc_root nextState cmd_str} {
 proc ::scobj::isotech_ps::noResponse {tc_root} {
   set catch_status [ catch {
     debug_log 1 "noResponse tc_root=${tc_root} sct=[sct] resp=[sct result]"
+# hook code goes here
     return "idle"
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}
@@ -145,6 +148,7 @@ proc ::scobj::isotech_ps::setValue {tc_root nextState cmd_str} {
     }
     set par [sct target]
     set cmd "${cmd_str}${par}"
+# hook code goes here
     if { [hpropexists [sct] driving] } {
       if { [hpropexists [sct] writestatus] && [sct writestatus] == "start" } {
         sct driving 1
@@ -245,7 +249,9 @@ proc ::scobj::isotech_ps::mk_sct_isotech_ps { sct_controller name } {
     hsetprop ${scobj_hpath}/amps nxsave true
     hsetprop ${scobj_hpath}/amps units A
     hsetprop ${scobj_hpath}/amps oldval 0.0
+    hsetprop ${scobj_hpath}/amps sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/amps type "part"
+    hsetprop ${scobj_hpath}/amps nxalias "${name}_amps"
 
     hfactory ${scobj_hpath}/relay plain user int
     hsetprop ${scobj_hpath}/relay read ${ns}::getValue ${scobj_hpath} read_relay {F}
@@ -258,7 +264,9 @@ proc ::scobj::isotech_ps::mk_sct_isotech_ps { sct_controller name } {
     hsetprop ${scobj_hpath}/relay mutable true
     hsetprop ${scobj_hpath}/relay nxsave true
     hsetprop ${scobj_hpath}/relay oldval 0
+    hsetprop ${scobj_hpath}/relay sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/relay type "part"
+    hsetprop ${scobj_hpath}/relay nxalias "${name}_relay"
 
     hfactory ${scobj_hpath}/volts plain user float
     hsetprop ${scobj_hpath}/volts read ${ns}::getValue ${scobj_hpath} rdValue {V}
@@ -272,7 +280,9 @@ proc ::scobj::isotech_ps::mk_sct_isotech_ps { sct_controller name } {
     hsetprop ${scobj_hpath}/volts nxsave true
     hsetprop ${scobj_hpath}/volts units V
     hsetprop ${scobj_hpath}/volts oldval 0.0
+    hsetprop ${scobj_hpath}/volts sdsinfo "::nexus::scobj::sdsinfo"
     hsetprop ${scobj_hpath}/volts type "part"
+    hsetprop ${scobj_hpath}/volts nxalias "${name}_volts"
 
     if {[SplitReply [environment_simulation]]=="false"} {
       ${sct_controller} poll ${scobj_hpath}/amps 5
@@ -282,6 +292,7 @@ proc ::scobj::isotech_ps::mk_sct_isotech_ps { sct_controller name } {
       ${sct_controller} write ${scobj_hpath}/volts
     }
     hsetprop ${scobj_hpath} klass environment
+# hook code goes here
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}
 }