class_docstr: Exception for reporting errors from a subprocess
code: def __str__(self):
      if self.subprocess.stderr is not None:
          error = self.subprocess.stderr.read()
      else:
          error = ""
      return "%s ; command: %s; error: %s" % (
          self.message,
          self.command,
          error,
      )
  
file_path: TimeSide/timeside/core/exceptions.py
label_desc: Use image node_id 2 for calling the SubProcessError obj's underlying member method code with example usage: obj.__str__() and returns: unknown