node name mangled in connections

[laroque]

I get the following:

2019-02-09 00:46:52 [ INFO] (tid 140589750740736) tream_manager.cc(350): Adding connection <ch0_fft.out_0:ich0_fft.in_0>                                   
2019-02-09 00:46:52 [ WARN] (tid 140589750740736) l/daq_control.cc(121): Exception caught while resetting midge: Unable to join nodes: root join found no s
econd node with name <ich0_fft>

but my config file says (in the connections section):

- "fft.out_0:ifft.in_0"

further up it creates a node:

2019-02-09 00:46:52 [ INFO] (tid 140589750740736) tream_manager.cc(330): Adding node <ifft>                                                                
2019-02-09 00:46:52 [ INFO] (tid 140589750740736) /core/diptera.cc(45): initializing node <ch0_ifft>                                                       
2019-02-09 00:46:52 [DEBUG] (tid 140589750740736) ncy_transform.cc(55): Reading wisdom from file <wisdom_complex_inversefft.fftw3>                         
2019-02-09 00:46:52 [DEBUG] (tid 140589750740736) ncy_transform.cc(67): Configuring FFTW to use up to 1 threads.                                           
2019-02-09 00:46:52 [DEBUG] (tid 140589750740736) ncy_transform.cc(88): FFTW plan created; initialization complete                                         
2019-02-09 00:46:52 [ INFO] (tid 140589750740736) /core/diptera.cc(57): added node <ch0_ifft>