Error box missing by script

I have a transaction table and willing to go through each line and check if the running balance is correct.

the logic is: If last line balance -current withdrawal +current deposit =current balance, the line is correct.

I write the following code, and it does highlight the line with wrong calculation.

 

<Code Start>

using System;

 

int TotalLines = Context.Field("Balance").Items.Count;

       

 

//first, declare the first row with no rule error, checking will be done in the other script

Context.Field("Deposits").Items[0].HasRuleError =false;

Context.Field("Withdrawals").Items[0].HasRuleError =false;

Context.Field("Balance").Items[0].HasRuleError =false;

 

//declare variable

decimal thisLineBalance = 0;

decimal lastLineBalance = 0;

decimal thisLineWithdrawals = 0;

decimal thisLineDeposit = 0;

 

for (int i = 1; i < TotalLines ; i++)  

{

 

    //get balance, deposit and withdrawals of this and next line

    Decimal.TryParse(Context.Field("Balance").Items[i].Text, out thisLineBalance);

    Decimal.TryParse(Context.Field("Balance").Items[i-1].Text, out lastLineBalance);

    Decimal.TryParse(Context.Field("Withdrawals").Items[i].Text, out thisLineWithdrawals);

    Decimal.TryParse(Context.Field("Deposits").Items[i].Text, out thisLineDeposit);

    

    //Start Checking

    if(lastLineBalance - thisLineWithdrawals + thisLineDeposit == thisLineBalance)

    {

        Context.Field("Balance").Items[i].IsVerified = true;

        Context.Field("Deposits").Items[i].IsVerified = true;

        Context.Field("Withdrawals").Items[i].IsVerified = true;

 

        Context.Field("Balance").Items[i].HasRuleError = false;

        Context.Field("Deposits").Items[i].HasRuleError =false;

        Context.Field("Withdrawals").Items[i].HasRuleError =false;

    }  

    else//pop error if the running balance is not match

    {

        Context.CheckSucceeded=false;

        Context.ErrorMessage="Line Running Balance do not match.";    

        

        

        Context.Field("Balance").Items[i].IsVerified = false;

        Context.Field("Deposits").Items[i].IsVerified = false;

        Context.Field("Withdrawals").Items[i].IsVerified = false;          

        

        Context.Field("Balance").Items[i].HasRuleError=true;

        Context.Field("Deposits").Items[i].HasRuleError =true;

        Context.Field("Withdrawals").Items[i].HasRuleError =true;

 

    }

 

}

 

 

<Code End>

 

My problem are....

First,I have 3 lines having error, none of the error message will disappear until I correct all 3 lines with correct values. I expect while I correct anyone of the line, that line will remove the error message(red box).

Second, After I correct back all values, I intentionally change another 3 lines to wrong values and expect it pop 3 red box respectively.However, the result is only highlight as red box for the first line I adjust the value, but not the other.

 

Is it some logic error in my code?

 

It looks really strange and spend me a lot of time already and sincerely look for help.

Thanks