HBO0153I The section subsection of record is a section within section, which has no LENGTH defined. The length of section is defined by the length of its fields.
This message is a reminder that, in the absence of an explicit length specification for the section, the length of the section is determined by the named fields of the section rather than by the length of the subsection. The length is defined as the minimum length that accommodates the named fields of the section, which might be insufficient to accommodate the subsection.
Add a LENGTH clause for the section, or verify that the total length of the fields of the containing section is at least equal to the length of the subsection.