The RED P status indicator means that a process is only Partially Active.
(Satus Code Legend can be displayed with F10 from WRKDG display).
You can try to End and Restart the DG, or try to restart the process that lists the P.
This is done by modifying the “Start Process” parameter on the STRDG command prompt. Setting the value to *ALL will also do no harm as MiMiX will only try to start processes that are not active.