FMLGD_STRUC_ERROR is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Clearing Control: Data Container for Error Control" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_FMLGD_STRUC_ERROR TYPE FMLGD_STRUC_ERROR.
The FMLGD_STRUC_ERROR table consists of various fields, each holding specific information or linking keys about Clearing Control: Data Container for Error Control data available in SAP. These include MSGTY (Message Type), MSGNO (System Message Number), MSGV1 (Message variable 01), MSGV2 (Message variable 02)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .