-I: Adding /home/jwang/amber/dat/leap/prep to search path.
-I: Adding /home/jwang/amber/dat/leap/lib to search path.
-I: Adding /home/jwang/amber/dat/leap/parm to search path.
-I: Adding /home/jwang/amber/dat/leap/cmd to search path.
-s: Ignoring startup file: leaprc
-f: Source leap.in.

Welcome to LEaP!
Sourcing: ./leap.in
----- Source: /home/jwang/amber/dat/leap/cmd/leaprc.gaff
----- Source of /home/jwang/amber/dat/leap/cmd/leaprc.gaff done
Log file: ./leap.log
Loading parameters: /home/jwang/amber/dat/leap/parm/gaff.dat
Reading title:
AMBER General Force Field for organic molecules (Version 1.4, March 2010) add. info. at the end
Loading parameters: ./frcmod
Reading force field modification type file (frcmod)
Reading title:
remark goes here
Loading Prep file: ./DGN.prepin
Loaded UNIT: DGN
Checking Unit.
Building topology.
Building atom parameters.
Building bond parameters.
Building angle parameters.
Building proper torsion parameters.
Building improper torsion parameters.
old PREP-specified impropers:
 <DGN 1>:  C1'  C8   N9   C4  
 <DGN 1>:  H8   N9   C8   N7  
 <DGN 1>:  C6   C4   C5   N7  
 <DGN 1>:  C5   N1   C6   O6  
 <DGN 1>:  C6   C2   N1   H1  
 <DGN 1>:  N1   N3   C2   N2  
 <DGN 1>:  C2   H21  N2   H22 
 <DGN 1>:  C5   N9   C4   N3  
--Impropers:
  1	C1'<DGN> - C8<DGN> - N9<DGN> - C4<DGN>
  1	C2<DGN> - H21<DGN> - N2<DGN> - H22<DGN>
  1	C5<DGN> - O6<DGN> - C6<DGN> - N1<DGN>
  1	C6<DGN> - H1<DGN> - N1<DGN> - C2<DGN>
  1	N1<DGN> - N2<DGN> - C2<DGN> - N3<DGN>
  1	N3<DGN> - N9<DGN> - C4<DGN> - C5<DGN>
  1	N7<DGN> - C6<DGN> - C5<DGN> - C4<DGN>
  1	N9<DGN> - H8<DGN> - C8<DGN> - N7<DGN>
 total 8 improper torsions applied
 8 improper torsions in old prep form
Building H-Bond parameters.
Not Marking per-residue atom chain types.
Marking per-residue atom chain types.
 (no restraints)
	Quit