Erro SQL0407N Assignment of a NULL value to a NOT NULL

Olá Pessoal!!!Alguem sabe me dizer o pq deste erro????Não consigo entender o pq!!!SQL0407N Assignment of a NULL value to a NOT NULL column "TBSPACEID=2, TABLEID=536, COLNO=5" is not allowed. SQLSTATE=23502 /sistemas/Varilux/marketing/CargaTemp2005Grava.asp, line 40Obrigada,