The DUP IDL modify command enables or disables handling of duplicate modules. When enabled, each instance of a module running in an address space, including those that repeat, is handled by the IDL facility. The DUP IDL modify command syntax is:

DUP= {HANDLE | IGNORE}

Shown below is an example of the output of the DUP command:

IOAL2WI HANDLING OF DUPLICATE MODULES HAS BEEN ENABLED  

IOAL00I IDL FACILITY RECEIVED REQUEST(DUP=HANDLE)