Hi everyone, I just upgraded to PETSc 3.20 and read up on the new logging infrastructure - its a very nice improvement over the old version. I have some code which checks that every construction has a corresponding destruction via PetscStageLog stageLog; ierr = PetscLogGetStageLog(&stageLog); for (int i = 0; i < stageLog->stageInfo->classLog->numClasses; ++i) { if (stageLog->stageInfo->classLog->classInfo[i].destructions != stageLog->stageInfo->classLog->classInfo[i].creations) { crash(); } } This no longer works and I can't figure out how to port it. In particular, it looks like I need to get a PetscLogEvent number for creation and another for destruction to retrieve the relevant PetscEventPerfInfo objects per-class - is there some straightforward way to do that for every registered PETSc class? Best, David Wells