ERROR: mummer and/or mgaps returned non-zero

[cjchen5]

Hi,
I met ERROR: mummer and/or mgaps returned non-zero problem. Could you please help? Here is the error message:

1: PREPARING DATA
2,3: RUNNING mummer AND CREATING CLUSTERS
# reading input file "out.ntref" of length 582604772
# construct suffix tree for sequence of length 582604772
# (maximum reference length is 2305843009213693948)
# (maximum query length is 18446744073709551615)
# process 5826047 characters per dot
#.........................................................ERROR: mummer and/or mgaps returned non-zero
ERROR: Could not parse delta file, out.delta
error no: 400

Here is my code merge_wrapper.py -l 1000 $hybrid_assembly1 $hybrid_assembly2

Thanks!