select espr_codigo_multi24 from enfs_parametr 
 System.Web.UI.ViewStateException: Viewstate inválido. 
	Client IP: 187.111.145.154
	Port: 51017
	Referer: http://portao.nfse-tecnos.com.br/cad_consultaNotas.aspx
	Path: /cad_consultaNotas.aspx
	User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
	ViewState: 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... ---> System.FormatException: Comprimento inválido para uma matriz ou uma cadeia de caracteres de Base 64.
   em System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength)
   em System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
   em System.Convert.FromBase64String(String s)
   em System.Web.UI.ObjectStateFormatter.Deserialize(String inputString, Purpose purpose)
   em System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter2.Deserialize(String serializedState, Purpose purpose)
   em System.Web.UI.Util.DeserializeWithAssert(IStateFormatter2 formatter, String serializedState, Purpose purpose)
   em System.Web.UI.HiddenFieldPageStatePersister.Load()
   --- Fim do rastreamento de pilha de exceções internas --- Referência de objeto não definida para uma instância de um objeto.