Functional Group trailer missing. End-of-file encountered.
Description
The Functional Group trailer is missing because the end-of-file has been reached. A Functional Group header was previously encountered, and so a matching Functional Group trailer must be present.
For ASC/X12, the Functional Group header and trailer identifiers are GS and GE respectively.
For UN/EDIFACT, the Functional Group header and trailer identifiers are UNG and UNE respectively.