IKJ79320I Unable to free previously allocated data sets. Enter ? for more information. +

Explanation
 Dynamic allocation encountered an error when attempting
to deallocate a data set.

System action
 This is a warning. The ALTLIB command continues
after issuing the message.  If you issued the ALTLIB command to DEACTIVATE
or RESET alternative libraries, these libraries will no longer be
searched.  The allocation of the ddname specified in the message will
not change. This message is accompanied by further messages describing
the reason the ALTLIB command failed:
 Message text is provided
by dynamic allocation regarding the SVC99 error.

User response
 Check the specified ddname to see if the cause
of the error can be determined.
 Dynamic allocation return
code return_code reason code reason_code

User response
 Contact your TSO/E administrator for assistance,
or consult z/OS MVS Programming: Authorized Assembler Services Guide 
to interpret the return and reason codes.

Module
 IKJADALC

Audience
 ALTLIB user