Warning: This topic does not affect the C generator.
Some display attributes must not be used simultaneously.
Example
HI + RI + UL = ND
HI |
High intensity attribute, |
RI |
Reverse image attribute, |
UL |
Underline attribute, |
ND |
Non display attribute. |
A screen field with the three display attributes - UL, RI and HI - is actually displayed as having the ND attribute (non display).
This situation can occur when an error message is sent to an Input or Input/Output (underlined) field in high intensity. Sending the error message on this field puts it in reverse-image mode; the field now has the three attributes: UL, RI and HI which become ND.
Warning: Input and Input/Output fields are underlined by default.