Thank you so much. My problem appears to be how I was creating the cursor.

CREATE CURSOR Test (PK I, txt C(20) NULL, val1 I NULL, dt D NULL)
INSERT INTO Test VALUES (1, "One", 1, DATE())
INSERT INTO Test VALUES (2, "Two", 2, NULL)
INSERT INTO Test VALUES (3, "Three", NULL, NULL)
INSERT INTO Test VALUES (4, "Four", NULL, DATE())
CURSORTOXML(0, "Test1.xml", 1,512,0)

CREATE CURSOR NG (PK I, txt C(20) DEFAULT NULL, val1 I DEFAULT NULL, dt D DEFAULT NULL) && Doesn't work
XMLTOCURSOR("Test1.xml", "ng", 8912)
BROWSE nowait
SELECT 0
CREATE CURSOR OK (PK I, txt C(20) NULL, val1 I NULL, dt D NULL) && works
XMLTOCURSOR("Test1.xml", "ok", 8912)
BROWSE nowait