FSL_STR_ECH_DATA 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 "Data for Error and Conflict Handling" 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_FSL_STR_ECH_DATA TYPE FSL_STR_ECH_DATA.
The FSL_STR_ECH_DATA table consists of various fields, each holding specific information or linking keys about Data for Error and Conflict Handling data available in SAP. These include MAIN_ERROR_MESSAGE (), TYPE (Message type: S Success, E Error, W Warning, I Info, A Abort), ID (Message Class), NUMBER (Message Number)... 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. .