The SORT Statement

If a SORT statement appears in a section that is not an independent segment, then any input procedures or output procedures referenced by that SORT statement must appear:

• totally within non-independent segments, or
• wholly contained in a single independent segment.

If a SORT statement appears in an independent segment, then any input procedures or output procedures referenced by that SORT statement must be contained:

• totally within non-independent segments, or
• wholly within the same independent segment as that SORT statement.

SORT procedures should not be invoked by multiple threads simultaneously.