System.StackOverFlow in ANTLR(Lexer class file)

[mmayur]

I'm using ANTLR parser for a txt file of around 5 MB. My main grammer module contains displaying contents between START_TAG(<) and END_TAG(>).

fragment ELEMENT
: (
[code=cpp]
(ELEMENT
| t=PCDATA
{ Console.Out.Wri teLine("PCDATA: \""+$t.Text+"\" "); }
//| t=CDATA
// { Console.Out.Wri teLine("CDATA: \""+$t.Text+"\" "); }
// | t=COMMENT
// { Console.Out.Wri teLine("Comment : \""+$t.Text+"\" "); }
//| pi=PI
)*
END_TAG[/B]
)
[/code]
When the grammer is converted to a C# code, the Lexer class file contains mELEMENT() method which contains the below code.
[code=cpp]
public void mELEMENT() // throws RecognitionExce ption [2]
{
Token t = null;
mSTART_TAG();
// On some particular condition.
switch (alt4)
{
case 1 :
{
mELEMENT();
}
break;
case 2 :
{
int nameStart125 = CharIndex;
mPCDATA();
t = new CommonToken(inp ut, Token.INVALID_T OKEN_TYPE, Token.DEFAULT_C HANNEL, nameStart125, CharIndex - 1);
Console.Out.Wri teLine(t.Text); }
break;
// Some conditions
mEND_TAG();
}
}
[/code]
After displaying contents of around 500 KB, a StackOverFlow error is being displayed at CommonToken() method. But the Call Stack points at mELEMENT().
Is the error because of the recursive call of mELEMENT() method or is there a problem the grammer or is there a problem in CommonToken() method?

Thanks in advance.

Regards,
Mayur