Copy empty Vsam file using SORT without error - Use of parameter VSAMEMT=YES in SORT

Once came across a scenerio where we had to copy a vsam file to a flat file and then process the flat file in subsequent steps.This is pretty simple and can be achived with a SORT step.But Once the same job abended when the VSAM file was emprty.
Came across this parameter VSAMEMT=YES which can be used with sort to handle this scenerio.

//STEP3 EXEC PGM=SORT,PARM=’VSAMEMT=YES’
//*
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=XXX.TEST.VSAM,DISP=SHR
//SORTOUT DD DSN=TEST.FLATFILE.COPY,DISP=MOD
//SYSIN DD *
SORT FIELDS=COPY
/*