Dear Colleague,

A bug has been discovered in the Dissipative Particle Dynamics code.

While the equation for the short-range electrostatic force in the user manual 
(equation 10.54) is correct, the related bug fix in INFOMAIL 10 for 
ewald_module.f90 is wrong. A superfluous set of brackets in line 134 around 1.d0 
- scrn should be removed so that lines 133-135 should read:

  eforce = 0.25d0 * gammaelec / pi * qiqj * (2.d0 * alphaew * rrr / rtpi * &
          &EXP (-alphaew * alphaew * rsq) + erfr) * (1.d0 - scrn * &
          &(1.d0 + 2.d0 * betaew * rrr * (1.d0 + betaew * rrr))) / (rsq * rrr)

We strongly recommend that all registered users should either make the code 
change shown above or download DL_MESO again using the instructions they 
received on registration to obtain the corrected version of the software. Re-
registration is not required and the same password is used for decryption.

Michael Seaton
2011-09-08