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Short helpfile for action RESTRAINT
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The following arguments are compulsory: 

                  SLOPE - ( default=0.0 ) specifies that the restraint is linear and 
                          what the values of the force constants on each of the variables 
                          are 
                  KAPPA - ( default=0.0 ) specifies that the restraint is harmonic 
                          and what the values of the force constants on each of the 
                          variables are 
                     AT - the position of the restraint 
                    ARG - the arguments on which the bias is acting. You can use 
                          multiple instances of this keyword i.e. ARG1, ARG2, ARG3... 


