%chk=CH4-2.chk

%mem=60GB

%nprocshared=20

#p b3lyp def2svp emp=gd3 scf=xqc pop=nboread

CH4

0 1

C 0.24027460 2.82036609 0.00000000

H 0.59692903 1.81155609 0.00000000

H 0.59694744 3.32476428 0.87365150

H 0.59694744 3.32476428 -0.87365150

H -0.82972540 2.82037927 0.00000000

$NBO AONAO=W49 FNAO=W49 DMNAO=W49 SKIPBO file=CH4 $END

This is my input file, but I can't find the .49 output file in the folder, what's the reason for this? Thank you all for your answers!