Impossible d'initialiser les parametres globaux

System.ArgumentException: Input string was not in a correct format.Couldn't store <> in RZ Column. Expected type is Int32. ---> System.FormatException: Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at System.String.System.IConvertible.ToInt32(IFormatProvider provider) at System.Data.Common.Int32Storage.Set(Int32 record, Object value) at System.Data.DataColumn.set_Item(Int32 record, Object value) --- End of inner exception stack trace --- at System.Data.DataColumn.set_Item(Int32 record, Object value) at System.Data.DataRow.set_Item(DataColumn column, Object value) at System.Data.DataRow.set_Item(String columnName, Object value) at OpenSystem.OsFlux.FluxRecherche.Parametres.AttribueParXPath(String chemin, Object val) at OpenSystem.OsSites.OsRecherche.Index.AttribueParam(String typeparam, Parametres FRParametre, NameValueCollection TableauParam) at OpenSystem.OsSites.OsRecherche.Index.InitialiseGlobales(Int32 num, ParametresXml Globals, String refsession) at OpenSystem.OsSites.OsRecherche.Index.Initialisation(Int32 idrechscenario)