Field help (AMZCODSAI)

The field is defined as being enterable, however in certain conditions it is possible that this should not be the case. The entry condition is a logical expression expressed in the X3 syntax. If the expression is true during the entry, the field will be entered, if not it will be displayed and its value saved. Example : To enter a field if the previous field is a yes : [M]ZONEPREC=2