MDS_CTRLS_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 "Message Structure of the Controller" 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_MDS_CTRLS_ERROR TYPE MDS_CTRLS_ERROR.
The MDS_CTRLS_ERROR table consists of various fields, each holding specific information or linking keys about Message Structure of the Controller data available in SAP. These include MESSAGES ()... 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. .