Turning wrapping of array field subscripts on or off (sys.IndexWrap )ΒΆ
sys.IndexWrap,,i1 |
Determines if subscripted fields wrap |
Determines whether the subscripts of an array field are to be wrapped. May be set to ON or OFF.
If sys.IndexWrap is OFF, then a subscript which is out of the range for the field referred to causes a null value to be referenced. For a field st.level subscripted ten times [10] the value of st.level[12] would always be null.
If sys.IndexWrap is ON, then subscripts are wrapped modulus their dimension. In this case, st.level[12] would access the same element as st.level[2].
The default for sys.IndexWrap is OFF.
NOTES
Subscripts used for textbox input are always wrapped, regardless of the value of sys.IndexWrap.
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