z/VM: CP Commands and Utilities Reference - z/VM - IBM

SET CONCEAL
Messages
3. You may not specify SET CONCEAL ON if you have defined a multiprocessor
configuration. The protected application facility only supports virtual
uniprocessor systems.
4. If you use an application that runs with the protected application environment
active, be aware that an automatic re-IPL resets your virtual machine. If you IPL
a named saved system, storage is also cleared; therefore, data in virtual
machine storage is lost.
5. If the protected application environment is already active, the SET CONCEAL
ON command has no effect. Thus, if the break key has been reenabled using
the TERMINAL BRKKEY command, this second SET CONCEAL ON command
does not disable the break key.
6. For ASCII devices, hitting a double break or attention while in the protected
application environment posts an attention to the virtual machine rather than
presenting a CP READ. The only way to enable the double break or attention
again is to SET CONCEAL OFF.
HCP003E Invalid option - {option|command
contains extra option(s) starting with
option}
HCP6026E Operand missing or invalid.
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