The ERP activation for PARTdataManager and PARTproject can be set separately, namely via user interface or via config file:
User interface: PARTlinkManager -> Extras menu -> Configure dialog box -> PARTdataManager preferences
Configuration file $CADENAS_SETUP/plinkcommon.cfg
$CADENAS_SETUP/plinkcommon.cfg
[PARTdataManager] ERPenabled=1 ERPenabledPPrj=1
Value range: 0/1
0: ERP deactivated
1: ERP activated