Hi, I have got a new question. I'm now constructing a PCComposite from PCASM and another PCKSP (coarse problem). And construction of PCKSP needs to use the subksp's of PCASM. So I need to PCSetUp on the PCASM, right? But the KSP using PCComposite would setup PCASM again. How can I avoid twice setup of PCASM ? Thanks, Hui