IDC01657I OBJECT WAS SMS-MANAGED WHEN EXPORTED. CHANGED TO UNMANAGED.

Explanation
The object of an IMPORT command was SMS managed
when it was exported to the portable data set. After processing of
the IMPORT command, the object became unmanaged.

System action
The object is imported to unmanaged storage.

Source
DFSMSdfp

Module
IDCMP01