added Erdi's contraint modification
added Erdi's contraint modification

FeMTTU/femus,saikanth88/femus,giorgiobornia/femus,FeMTTU/femus,giorgiobornia/femus,giorgiobornia/femus,saikanth88/femus,FeMTTU/femus,FeMTTU/femus,saikanth88/femus,giorgiobornia/femus,saikanth88/femus