Store Procedure Problem

Hi, I have a store procedure which returns, with a Foreach, a result set from a select but It just works fine the first time that you execute it the following times it returns strange data in a string field. I have tryed everything but nothing seems to work. .... foreach select ndocto_ve, abaf201_razon,femisi_ve, neto_ve,iva_ve, bruto_ve,numot_ve,catai_glos, tipo_producto, nro_nv, cant_g, kg , descr, nom_prod into lndocto_ve ,lcliente ,lfemisi_ve ,lneto_ve , liva_ve , lbruto_ve ,lnumot_ve , lvendedor , ltipo_producto , lnro_nv ,lcant_g, lkg, ldescr ,lnom_prod from tot_fact_final where descr matches vmercado and tipo_producto matches vtipo_prodreturn lndocto_ve ,lcliente ,lfemisi_ve ,lneto_ve , liva_ve , lbruto_ve ,lnumot_ve , lvendedor , lnro_nv ,lcant_g, lkg ,ldescr ,lnom_prod,ltipo_producto with resume; end foreach; ... Thanks for your help Felipe