Dear Colleague,

A bug has been spotted in the Dissipative Particle Dynamics (DPD) code of 
DL_MESO version 2.6.

During pairwise force calculations, arrays are used to store data for particle 
pairs: the sizes of these are initially estimated based on the maximum number of 
particles per link cell. These arrays can be resized in the unlikely event that 
the number of pairs exceeds this estimated limit, but unfortunately the array 
resizing is currently occurring incorrectly. (Many thanks are due to Stephen 
Pickles for spotting this bug.)

To fix the bug, please change lines 297, 491, 691, 878, 1076 and 1289 in 
field_module.f90 and lines 321, 560, 808, 1041, 1307 and 1588 in 
field_module_omp.f90 to:

  ALLOCATE (pairs (3, mxpairs), pair data (4, mxpairs), STAT=fail)

(Note that this line should replace pairbuf with mxpairs in the allocation of 
the array pairdata.)

We strongly recommend that all registered users of DL_MESO version 2.6 should 
either make the above code change or re-download the package using the 
instructions received on registration to get the corrected version of the 
software. Re-registration is not required and the same password is used for 
decryption.

Michael Seaton
2016-02-12