GDGLOCATE={
Y|N} 

Y
. The PowerExchange Listener uses the most recent z/OS catalog information for a generation data set when reading or writing a generation data set in a GDG based on a relative generation number.
PowerExchange refreshes the generation table for a GDG by specifying the S99GDGNT bit in S99FLAGS1 on a dynamic allocation (SVC99) request. The dynamic allocation request then uses the LOCATE function to determine the latest absolute generation in the GDG based on the catalog information.
N
. The PowerExchange Listener does not refresh the generation table with the latest information from the z/OS catalog after it references the GDG the first time by using a relative generation number. All future Listener requests that use the relative generation number will access the same absolute generation as the first reference.