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APBS‎ > ‎User guide‎ > ‎Running APBS‎ > ‎Input files‎ > ‎APOLAR input file section‎ > ‎APOLAR keywords‎ > ‎

calcforce

This optional keyword controls apolar force output. Its syntax is
calcforce {flag}
where flag is a string that specifies the types of force values to be returned:
no (Deprecated)
    Don't calculate any forces
total
    Calculate and return total apolar forces for the entire molecule
comps
    Calculate and return total apolar forces for the entire molecule as well as force components for each atom.
Note that this option must be used consistently for all calculations that will appear in subsequent PRINT statements. For example, if the statement
print force 1 - 2 end
appears in the input file, then both calculations 1 and 2 must have calcforce keywords present with the same values for flag.