L1340 - Tuple Record Cannot Be Exported

Error

-module(main).
-record(tup, {a}).
-export_record([tup]).
%%             ^^^ error: tuple records cannot be exported; only native records can

Explanation

The error occurs when a classic tuple record is listed in an -export_record attribute.

Only native records (EEP-79) can be exported and used from other modules; tuple records are local to the module (or header) that defines them. To fix the error, either make the record a native record (-record(#tup {a}).) or remove it from the export list.