Microsoft VBScript runtime error '800a005e'

Invalid use of Null: 'Replace'

C:\SITES\ECOVIAGEM\HTTODOCS\BRASIL\MINAS-GERAIS\SAO-SEBASTIAO-DO-PARAISO\HOTEL-FAZENDA\HOTEL-FAZENDA-LEAO-DE-JUDA\../../../../../inc-could/tipos/3.asp, line 244