KS3U021E The data set could not be accessed due to an incorrect data set organization. The data set must be a sequential or a fully qualified member of a partitioned data set.

Explanation
			
				The data set that you specified is partitioned, but you
				did not specify a member name. Also, you might have
				specified a member of a partitioned data set, but the
				data set is sequential.
			
		
User response
			
				Correct the data set name and retry. Note that you
				cannot access VSAM data sets using this dialog box.