Hello, First I have compiled KDE 3.1.1 successfully (with problems, but I have managed to solve them), but i haven't seen this particular problem. Evidently something wrong with system includes. Try to include task.h before procfs.h in kdebase-3.1.1/ksysguard/ksysguardd/Solaris/ProcessList.c, it may help. Regards, David.