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OMD[mysite]:~$ cmk --convert-rrds localhost
Traceback (most recent call last):
  File "/omd/sites/rrd/bin/cmk", line 94, in <module>
    exit_status = modes.call(mode_name, mode_args, opts, args)
  File "/omd/sites/rrd/lib/python/cmk_base/modes/__init__.py", line 72, in call
    return mode.handler_function(*handler_args)
  File "/omd/sites/rrd/lib/python/cmk_base/modes/cee.py", line 147, in mode_convert_rrds
    rrd.do_convert_rrds(*args)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 413, in do_convert_rrds
    convert_rrds_of_host(hostname)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 428, in convert_rrds_of_host
    console.error("      %sERROR: %s%s\n" % (tty.red + tty.bold, e, tty.normal))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 70-75: ordinal not in range(128)

OMD[rrd]:~$ cmk -vv --debug --convert-rrds localhost
...
  Urlaubstüüüüüüge (PNP)...
    - Metric1..Traceback (most recent call last):
  File "/omd/sites/rrd/bin/cmk", line 94, in <module>
    exit_status = modes.call(mode_name, mode_args, opts, args)
  File "/omd/sites/rrd/lib/python/cmk_base/modes/__init__.py", line 72, in call
    return mode.handler_function(*handler_args)
  File "/omd/sites/rrd/lib/python/cmk_base/modes/cee.py", line 147, in mode_convert_rrds
    rrd.do_convert_rrds(*args)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 413, in do_convert_rrds
    convert_rrds_of_host(hostname)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 422, in convert_rrds_of_host
    convert_pnp_rrds(hostname, existing_rrds)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 441, in convert_pnp_rrds
    cmk.utils.pnp_cleanup(servicedesc), target_rrdconf)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 472, in convert_pnp_rrds_of
    result = convert_pnp_rrd(old_rrd_path, new_rrd_path, old_ds_name, rrdconf)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 497, in convert_pnp_rrd
    old_rrdconf = get_old_rrd_config(old_rrd_path, old_ds_name)
  File "/omd/sites/rrd/lib/python/cmk_base/cee/rrd.py", line 789, in get_old_rrd_config
    old_config_raw = rrdtool.info([rrd_file_path])
TypeError: Element 0 in argument 0 must be str