Dear PETSc users, I am confused by the usage of SNESSetOptionsPrefix. I understand this is required if you have for example different SNES in your program and want to set different options for them. So for my second snes I wrote
call SNESCreate(MPI_COMM_SELF,snes,ierr) call SNESSetOptionsPrefix(snes,'green_',ierr) call SNESSetFromOptions(snes,ierr) etc. Then when launching the program I wanted to monitor that snes so I launched it with the option -green_snes_monitor instead of -snes_monitor. But I keep getting the message WARNING! There are options you set that were not used! WARNING! could be spelling mistake, etc! Option left: name:-green_snes_monitor (no value) What do I miss here? Best regards Timothée NICOLAS
