SQL Parse Error: Parameter name expected using firebird - firebird

Question

I'm using the script in firebird:
SET TERM ^ ;
execute block as
declare a_cursor CURSOR FOR(select contaSelect.cdcontacontabil, spedcontavincSelect.nuversao, spedcontavincSelect.cdcontasped
from ectbconta contaSelect join ectbspedcontavinc spedcontavincSelect on contaSelect.cdempresa=spedcontavincSelect.cdempresa and contaSelect.cdconta=spedcontavincSelect.cdconta where contaSelect.cdempresa = 1);
​
declare variable contacontabil varchar(40);
declare variable versao integer;
declare variable contasped integer;
​
begin
open a_cursor;
while(1=1) do
begin
fetch a_cursor INTO contacontabil, versao, contasped;
if (row_count = 0) then leave;
insert into ectbspedcontavinc (cdempresa, cdconta, nuversao, cdcontasped)
select contaInsert.cdempresa, contaInsert.cdconta, :versao, :contasped from ectbconta contaInsert
where contaInsert.cdcontacontabil =:contacontabil and contaInsert.cdempresa in(2, 3, 4)
and not exists (select * from ectbspedcontavinc spedcontavincInsert
where spedcontavincInsert.cdempresa=contaInsert.cdempresa and spedcontavincInsert.cdconta=contaInsert.cdconta and spedcontavincInsert.nuversao=:versao and spedcontavincInsert.cdcontasped=:contasped);
end
end
^
​
SET TERM ; ^
​
COMMIT WORK;
Ocurred this message:
Error Message:
---------------------------------------- SQL Parse Error:
Parameter name expected
D:\Java\Firebird_2_5\bin>isql.exe -z ISQL Version: WI-V2.5.5.26952
Firebird 2.5 Use CONNECT or CREATE DATABASE to specify a database SQL>
I don't know what do.
public class CriaScriptSpedContaVincService {
private static final Integer GRUPO_EMPRESA_CTB = 3;
private static final Integer CD_EMPRESA_CONSOLIDADORA = 102;
public void criaCriaScriptSpedContaVinc() {
StringBuilder script = new StringBuilder();
IContabEmpresa contabEmpresa = new ContabEmpresaProvider();
List<Integer> empresas = contabEmpresa.retornaEmpresasDoGrupoContabil(GRUPO_EMPRESA_CTB);
for (Integer cdEmpresa : empresas) {
script.append("INSERT INTO ECTBSPEDCONTAVINC (CDEMPRESA, CDCONTA, NUVERSAO, CDCONTASPED) ");
script.append("SELECT ");
script.append(cdEmpresa);
script.append(" AS CDEMPRESA, C.CDCONTA, C.NUVERSAO, C.CDCONTASPED ");
script.append("FROM ECTBSPEDCONTAVINC C WHERE C.CDEMPRESA = ");
script.append(CD_EMPRESA_CONSOLIDADORA);
script.append(" AND NOT EXISTS (SELECT * FROM ECTBSPEDCONTAVINC CV WHERE CV.CDEMPRESA = ");
script.append(cdEmpresa);
script.append(" AND CV.CDCONTA = C.CDCONTA);");
script.append(TextUtil.NOVA_LINHA);
}
String caminhaCompletoArquivo = "t:/xande/script2.sql";
FileUtil.escreveArquivo(script, caminhaCompletoArquivo);
System.out.println("Fechou mano... ;)");
}
}