Unexpected exception encountered in JFlex about jflex HOT 3 CLOSED

package sintatico;


import sintatico.sym;
//import static lexico.Tokens.*;
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//%public
%cup
%full
%line
%char
%ignorecase 
%eofval{
    return new Symbol(sym.EOF, new String("Fim do Arquivo"));
%eofval}
//%class AnalisadorLexico
//%type Tokens   
BRANCO = [ \n\t\r]
/*%{
public String lexema;
/*public int ContaToken;*/
%}*/

ID = [_|a-z|A-Z][a-z|A-Z|0-9_]*
INTEIRO = 0|[1-9][0-9]*
%%

("se")		{return new Symbol(sym.SE, yychar, yyline, yytext());}
("senao")	{return new Symbol(sym.SENAO, yychar, yyline, yytext());}
("senaose")	{return new Symbol(sym.SENAOSE, yychar, yyline, yytext());}
("enquanto")	{return new Symbol(sym.ENQUANTO, yychar, yyline, yytext());}
("faca")	{return new Symbol(sym.FACA, yychar, yyline, yytext());}
("para")	{return new Symbol(sym.PARA, yychar, yyline, yytext());}
("+")		{return new Symbol(sym.MAIS, yychar, yyline, yytext());}
("-")		{return new Symbol(sym.MENOS, yychar, yyline, yytext());}
("*")		{return new Symbol(sym.VEZES, yychar, yyline, yytext());}
("/")		{return new Symbol(sym.DIVISAO, yychar, yyline, yytext());}
("=")		{return new Symbol(sym.IGUAL, yychar, yyline, yytext());}
("<")		{return new Symbol(sym.MENOR, yychar, yyline, yytext());}
(">")		{return new Symbol(sym.MAIOR, yychar, yyline, yytext());}
("<=")          {return new Symbol(sym.MENORIGUAL, yychar, yyline, yytext());}
(">=")		{return new Symbol(sym.MAIORIGUAL, yychar, yyline, yytext());}
(";")		{return new Symbol(sym.PTVIRG, yychar, yyline, yytext());}
("{")           {return new Symbol(sym.ACHAVE, yychar, yyline, yytext());}
("}")           {return new Symbol(sym.FCHAVE, yychar, yyline, yytext());}
("(")           {return new Symbol(sym.APARENT, yychar, yyline, yytext());}
(")")           {return new Symbol(sym.FPARENT, yychar, yyline, yytext());}
{INTEIRO}	{return new Symbol(sym.INTEIRO, yychar, yyline, yytext());}
{ID}		{return new Symbol(sym.ID, yychar, yyline, yytext());}
{BRANCO}	{}
. {System.err.println("Caractere Ilegal: " + yytext());}

%%

%full
%ignorecase

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s {}
sn {}

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%full
%ignorecase

%%

sb {}