Because of the addition of const to many function parameters, the logging and tracing parts of MPE2 1.3.0 will not compile with an implementation of MPI 3 such as the newest versions of MPICH and MVAPICH. I have attached a patch to fix that. The main issue with it is that it would break compatibility with MPI 2.* implementations that do not have the extra const modifiers; a version of it to put into the MPE release would probably need a macro for the newly-added consts that can enable them selectively. However, the patch provided is likely to work for users who have this issue. -- Jeremiah Willcock