maxlib will fail to compile under linux if you have a PD version that is not 0.37 so, to fix this, I changed this line: #if defined PD_MAJOR_VERSION && PD_MAJOR_VERSION==0 && PD_MINOR_VERSION==37 to: #if defined PD_MAJOR_VERSION && PD_MAJOR_VERSION==0 && PD_MINOR_VERSION>37 in the following files: netserver.c netrec.c netclient.c best -august.