diff --git a/src/interface.jl b/src/interface.jl
index 2942510..458c551 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -25,7 +25,7 @@ julia>
 
 # Signature
 """
-function jsoncorrection(config::Dict, jsonstring::String, context) 
+function jsoncorrection(config::Dict, jsonstring::String, context; maxattempt=3) 
 
   initialstate = Dict{Symbol, Any}(
     :reward=> 0,
@@ -41,18 +41,15 @@ function jsoncorrection(config::Dict, jsonstring::String, context)
   
   transitionargs = (
                     config=config, 
-                    decisionMaker=decisionMaker, 
-                    evaluator=evaluator, 
-                    reflector=reflector,
                     context=context,
                   )
   _, result = LLMMCTS.runMCTS(initialstate, transition, transitionargs;
-                          totalsample=1, maxdepth=3, maxiterations=1, explorationweight=1.0)
+                          totalsample=1, maxdepth=(maxattempt-1), maxiterations=1, explorationweight=1.0)
 
-  if result[:response] !== nothing
-    return response=result[:code]
+  if result[:isterminal] == true
+    return (response=result[:code], errormsg=nothing, success=true)
   else
-    return response=result[:errorexplain]
+    return (response=nothing, errormsg=result[:errorexplain], success=false)
   end
 end
 
@@ -81,9 +78,6 @@ function transition(state::T1, args::NamedTuple
   ) where {T1<:AbstractDict}
 
   config::AbstractDict = args[:config]
-  decisionMaker::Function = args[:decisionMaker]
-  evaluator::Function = args[:evaluator]
-  reflector::Function = args[:reflector]
   context = args[:context]
 
   # only for the 1st transition
@@ -107,6 +101,8 @@ function transition(state::T1, args::NamedTuple
     end
   end
 
+  println("Attempting to correct JSON. ", @__FILE__, " ", @__LINE__)
+
   explain, jsonstr = decisionMaker(state, config, context)
   response, errormsg, reward, isterminal = executeJSON(jsonstr)
 
@@ -120,7 +116,8 @@ function transition(state::T1, args::NamedTuple
   newstate[:reward] = reward
   newstate[:isterminal] = isterminal
 
-  stateevaluation, progressvalue = evaluator(newstate, config)
+  # stateevaluation, progressvalue = evaluator(newstate, config)
+  stateevaluation, progressvalue = ("None", 0) # vscode debug error @ evaluator(newstate, config)
 
   return (newNodeKey=newNodeKey, newstate=newstate, progressvalue=progressvalue)
 end
@@ -157,12 +154,16 @@ function decisionMaker(state, config, context)
   Execution error: Code from the last round error
 
   You should then respond to the user with:
-  - Why: Why couldn't the JSON string be loaded? Are there any steps missing in your plan?  What does the execution error imply?
+  - Why: Are there any steps missing in your plan?  What does the execution error imply?
+  - Plan: 
+      1) What to do next to complete the task from the current situation. 
+      2) Be specific.
   - Code:
-        1) Write the correct JSON string version.
+      1) Write a correct JSON string version of the code by improving upon the last round.
 
   You should only respond in format as described below and nothing more:
   "Why": ...,
+  "Plan": ...,
   "Code": ...
   
   Let's begin!
@@ -196,7 +197,6 @@ function decisionMaker(state, config, context)
   prompt *=
     """
     <|start_header_id|>assistant<|end_header_id|>
-    {
     """
 
   externalService = config[:externalservice][:text2textinstruct]
@@ -220,6 +220,7 @@ function decisionMaker(state, config, context)
       :kwargs=> Dict(
         :max_tokens=> 512,
         :stop=> ["<|eot_id|>"],
+        :temperature=>0.2,
         )
       )
     )
@@ -227,22 +228,11 @@ function decisionMaker(state, config, context)
   for i in 1:5
     response = GeneralUtils.sendReceiveMqttMsg(outgoingMsg)
     _responseJsonStr = response[:response][:text]
-
-    if length(split(_responseJsonStr, "Code:")) == 2
-      x = split(_responseJsonStr, "Code:")
-      if occursin("Why", x[2])  
-        error("88")
-      end
-      return x
-    elseif length(split(_responseJsonStr, "Code\":")) == 2
-      x = split(_responseJsonStr, "Code\":")
-      if occursin("Why", x[2])  
-        error("88")
-      end
-      return x
-    else
-      println("Trying to get Code part")
-    end
+    d = split(_responseJsonStr, "Code")
+    _code = d[2]
+    index = findfirst(":", _code)[end]
+    code = _code[index+1:end]
+    return (explain=d[1], code=code)
   end
   error("Failed to get Code part.")
 end
@@ -268,9 +258,7 @@ julia>
 # Signature
 """
 function evaluator(newstate, config)
-  evaluation="None"
-  score=0 
-  return (evaluation=evaluation, score=score)
+  return ("None", 0)
 end
 
 
@@ -320,15 +308,15 @@ julia>
 """
 function executeJSON(jsonstring)
   try
-    jsonobj = JSON3.read(jsonstring)
+    d = copy(JSON3.read(jsonstring))
 
-    if typeof(jsonobj) <: JSON3.Object
-      if length(JSON3.write(jsonobj)) < 0.7 * length(jsonstring)
+    if typeof(d) <: AbstractDict
+      if length(JSON3.write(d)) < 0.7 * length(jsonstring)
         # sometime the original jsonstr is long but the resulting response is short which means 
         # a lot of string was lost. This is not OK.
         return (response=nothing, errormsg="JSON string lost too much content compared to the original when executed. Probably due to some brackets are missing or missplaced.", reward=0, isterminal=false)
       else
-        return (response=copy(jsonobj), errormsg=nothing, reward=1, isterminal=true)
+        return (response=jsonstring, errormsg=nothing, reward=1, isterminal=true)
       end
     else
       return (response=nothing, errormsg="JSON string parsing failed. Probably due to some brackets are missing or missplaced.", reward=0, isterminal=false)