Parameter not found and Could not set parameter in FVP Corstone SSE-300 Ethos-U55

Hi, I am trying to run a code in Corstone SSE-300. I am getting error, 

Warning: parameter error: 'cpu0.has_pmu': parameter not found

Error: configuration file error: config.txt:78: Could not set parameter 'cpu0.has_pmu'

For around 20 parameter even though they are defined in the config.txt file. I have set the value of the parameter cpu0.has_pmu = 1 , still the problem exist. The code executes properly if I remove these parameter from congif.txt. But I want these parameters. Need help.