def test_makecpt_output_to_cpt_file():
        """
        Save the generated static color palette table to a .cpt file
        """
        with GMTTempFile(suffix=".cpt") as cptfile:
>           makecpt(output=cptfile.name)

../pygmt/tests/test_makecpt.py:82: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../pygmt/helpers/decorators.py:187: in new_module
    return module_func(*args, **kwargs)
../pygmt/helpers/decorators.py:282: in new_module
    return module_func(*args, **kwargs)
../pygmt/mathops.py:65: in makecpt
    lib.call_module(module="makecpt", args=arg_str)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <pygmt.clib.session.Session object at 0x7fe9ae6ad470>, module = 'makecpt', args = ' -H -> /tmp/pygmt-dz2kwkqs.cpt'

    def call_module(self, module, args):
        """
        Call a GMT module with the given arguments.
    
        Makes a call to ``GMT_Call_Module`` from the C API using mode
        ``GMT_MODULE_CMD`` (arguments passed as a single string).
    
        Most interactions with the C API are done through this function.
    
        Parameters
        ----------
        module : str
            Module name (``'pscoast'``, ``'psbasemap'``, etc).
        args : str
            String with the command line arguments that will be passed to the
            module (for example, ``'-R0/5/0/10 -JM'``).
    
        Raises
        ------
        GMTCLibError
            If the returned status code of the function is non-zero.
    
        """
        c_call_module = self.get_libgmt_func(
            "GMT_Call_Module",
            argtypes=[ctp.c_void_p, ctp.c_char_p, ctp.c_int, ctp.c_void_p],
            restype=ctp.c_int,
        )
    
        mode = self["GMT_MODULE_CMD"]
        status = c_call_module(
            self.session_pointer, module.encode(), mode, args.encode()
        )
        if status != 0:
            raise GMTCLibError(
                "Module '{}' failed with status code {}:\n{}".format(
>                   module, status, self._error_message
                )
            )
E           pygmt.exceptions.GMTCLibError: Module 'makecpt' failed with status code 71:
E           makecpt [ERROR]: Syntax error: No input files expected unless -E or -S are used

../pygmt/clib/session.py:490: GMTCLibError
--------------------------------------------------------------------------------- Captured stderr call ---------------------------------------------------------------------------------
makecpt [ERROR]: Syntax error: No input files expected unless -E or -S are used