ICH561I

Explanation
In MVS™ 5.2.0
and later environments, RACF® data
sets can reside on devices whose UCB is above 16MB. When a RACF data set is deactivated, RACF issues the IOSCAPU macro to "uncapture" a
UCB that "captured" into a window below 16MB when the data set
was activated and the uncapture request failed.

System action
The system issues message ICH506I following this
message. Deactivation of the RACF data
set continues.

Operator response
Notify your systems programmer.

System programmer response
See the MVS documentation
for the IOSCAPU return and reason codes to determine why the UCB for
the device containing the RACF data
set cannot be "uncaptured".