The Duplicate Key window provides for selecting the key for the FMEA data to save when duplicate keys are encountered during the building of a FMEA Fault Equivalence file from FMEA data in a System file. For this window to open, Prompt on Each Duplicate Key must be selected for FMEA > Build Fault Equivalence file duplicate key handling in the Options window. For more information, see FMEA User Options.