I,m getting this error when I try to convert some data, can someone help me?

Traceback (most recent call last):
  File "/home/ramao/galaxy/lib/galaxy/jobs/runners/local.py", line 156, in run_job
    job_wrapper.finish( stdout, stderr, exit_code )
  File "/home/ramao/galaxy/lib/galaxy/jobs/__init__.py", line 412, in finish
    dataset.datatype.set_meta( dataset, overwrite = False ) #call datatype.set_meta directly for the initial set_meta call during dataset creation
  File "/home/ramao/shed_tools/web.uniparthenope.it/repos/montella/galaxy_es_core/a8f8a904173c/galaxy_es_core/earthsystem.py", line 318, in set_meta
    NetCDF.set_meta(self,dataset)
  File "/home/ramao/shed_tools/web.uniparthenope.it/repos/montella/galaxy_es_core/a8f8a904173c/galaxy_es_core/earthsystem.py", line 261, in set_meta
    ncml= execAndGetStdout("ncdump -x "+dataset.file_name)
  File "/home/ramao/shed_tools/web.uniparthenope.it/repos/montella/galaxy_es_core/a8f8a904173c/galaxy_es_core/earthsystem.py", line 48, in execAndGetStdout
    output=local(cmd, capture=True)
  File "/home/ramao/galaxy/eggs/Fabric-1.4.2-py2.7.egg/fabric/operations.py", line 1012, in local
    error(message=msg, stdout=out, stderr=err)
  File "/home/ramao/galaxy/eggs/Fabric-1.4.2-py2.7.egg/fabric/utils.py", line 305, in error
    return func(message)
  File "/home/ramao/galaxy/eggs/Fabric-1.4.2-py2.7.egg/fabric/utils.py", line 26, in abort
    sys.exit(1)
SystemExit: 1