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If an NCL process executing in an OCS window's NCL processing environment issues an &PANEL statement while the OCS window is in its usual roll mode, OCS (the current owner of the window) always allows the panel to be displayed.
If an NCL process attempts to issue an &PANEL statement when the OCS window is in Holding or Autohold On mode, the &PANEL statement is suspended. The OCS window is placed into FS-HOLD mode and requires operator input before the NCL process panel is allowed to take over the window. At this stage, (Holding or Autohold) the OCS window is logically considered to be in an &CONTROL NOSHAREW condition. That is, OCS owns the presentation area and is not prepared to release it.
Operator input releases the Holding or Autohold mode; OCS immediately switches to the logical &CONTROL SHAREW condition and allows the panel to be displayed.
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