Option

This instruction allows you to set the behavior of the language by activating or not certain options.

This option allows for the processing of null. 

This process is about retrieving the null attribute from a field (buffer I, B) and testing it, transmitting it and affecting it to other fields.

In order for the attribute null from an exit field (buffer O) not to be changed by the target engine, the null option for the O fields needs to have same (idem) as value.