# Enterprise Communication Interface (ECI)

## eci_nos_rel_usx

### Description
ECI function for calling a userexit for relation masks.
### Input parameter
cpEntNam
string | name of entity of father
cpMasNam
string | name of father list
cpMasExt
string | flag if father list extension switch is {on|off}
cpWdgMod
string | widget mode of father list {list|form|bvb}
cpActMod
string | action mode {bat}
cpaEntFld
stringlist | names of fields to select father
cpaEntVal
stringlist | values of fields to select father
cpEnt2Nam
string | name of entity of son
cpViewNam
string | name of view of relation
cpRefAgg
string | refine or aggregate list {ref|agg}
cpRelMasNam
string | name of list of relation
cpRelMasExt
string | flag if relation list extension switch {on|off}
cpRelWdgMod
string | widget mode for relation list {list|form|bvb}
cpUsxNam
string | name of menu userexit to call
cpUsxPar
string | userexit parameters
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### Output parameter
CaRet
string | Return code of menu-selection userexit
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