# Enterprise Communication Interface (ECI)

## eci_rea_doc_his_trn

### Description
Read history of life cycle of a document. Selection of requested document in batch mode Call appropriate history widget of the selected document (via CID). Select all NON MEMO-fields. If entries exist: Return the desired max. number of newest NON-MEMO entries Return appropriate return code.
| The document history is referenced by the document master data. Therefore, the document type is here not required. All NON-MEMO-entries of the history are returned (i.e. INSERT, TRANSITION, VERS_NEW etc.), therefore, the user must differentiate himself by interpreting the data fields! This function is still supported due to the upward compatibility. The general function eci_rea_rel (Entity1=EDB-DOCUMENT, Entity2=EDB-HISTORY, view=STR) supplies the same result.
### Input parameter
wdg_mod
string | mode of widget {"list"}
act_mod
string | mode of interaction {"bat"}
sel_fld_nam
string | names of fields of document for selection
sel_fld_val
string | values of fields of document for selection
ret_rec_max
string | max. number of newest modification text entries to return
ret_fld_nam
stringlist | names of fields of history for return
### Output parameter
n
string | count of selected data records
ret_fld_val_1 ... ret_fld_val_n
stringlist | values of fields of history-record 1
... | ...
stringlist | values of fields of history-record n