ALWNULL(*NO)

When an externally described file contains null-capable fields and the ALWNULL(*NO) keyword is specified on a control specification, the following conditions apply:

• A record containing null values retrieved from a file will cause a data mapping error and an error message will be issued.
• Data in the record is not accessible and none of the fields in the record can be updated with the values from the input record containing null values.
• With this option, you cannot place null values in null-capable fields for updating or adding a record. If you want to place null values in null-capable fields, use the ALWNULL(*USRCTL) option.