A common cause for Sysview parmlib changes not taking effect is editing the member below the )EOF statement. Changes to Sysview parmlib member statements must be made above the )EOF statement in the member. )EOF indicates Logical End of File, so any changes made after the )EOF statement will be ignored and will not be reflected. Another reason could be that SYSVIEW was up already, in such case the RELOAD subcmd should be used to allow SYSVIEW to read new definitions. Another option is COLD start.