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"test4" README
==============

Source: node.c errexit.c

Desc:	test to write multiple datasets on multiple (4) volumns           

Invoke:	load [0] node.rx [/cfs/ctape0 [TEST01 [TEST02 [TEST03 [TEST04]]]]]

Note:	* use 4 scratch tape
	* log is on "test4.SLr0"
	* result is on "test4.SRr0"
	* tape will be unloaded after the test

Algo:	* tapealloc 4 tapes with user exit call
	* tdsopen, twrite, and tdsclose 3 datasets;
	  the 1st dataset occupies the 1st volumn;
	  the 2nd dataset occupies the 2nd and 3rd volumns;
	  the 3rd dataset is in the 4th volumn. 
	* tapedealloc 
	* UEXITRET = 1 (value to return when user exit is called)
