When changes to options take effect

In general, changes to options take effect immediately, regardless of how they are specified. The only exception is the IDIS subsystem, which must be stopped and restarted if changes are made to any of these options:

• DataSets (IDIVSxxx(...),IDIEXEC(...),IDIDOC(...),IDIDOxxx(...),IDIVIEWS(...))
• DumpRegistrationExits
• Exclude/Include
• Language
• Locale
• NoDup(ImageFast(...))
• Quiet

where xxx is the language ID of the Language option that is in effect. (IDIDOxxx does not support ENU.)