PMVER (10-digit signed integer)

Structure version number.

The value must be one of the following:

PMVER1
Version-1 put-message options structure.
PMVER2
Version-2 put-message options structure.

Fields that exist only in the more-recent version of the structure are identified as such in the descriptions of the fields. The following constant specifies the version number of the current version:

PMVERC
Current version of put-message options structure.

This is always an input field. The initial value of this field is PMVER1.