Adaptive routing does not allow to run without at least 1 gauge specification.
There appears a segmentation fault for adaptive routing (processCase(8) = 2), if nGaugesTotal = 0 && NoGauges_basin(1) = 0 && dir_Gauges(1) = "./", i.e., Qobs is not provided. One selects this option when is interested in the gridded runoff only.
Note that processCase(8) = 1 handles this option.
Could @thober check, where could be the problem in mRM?
A possible workaround is to create idgauges.asc with at least one gauge, but we thought with @lese better to fix in the code as well ...