Problem launch ConnectivityViewer on some Connectivities

2015-07-08 21:05:32,631 - INFO - tvb.core.services.flow_service - Starting operation ConnectivityViewer.launch
2015-07-08 21:05:32,765 - ERROR - tvb.core.services.operation_service - Could not launch Operation with the given input data!
2015-07-08 21:05:32,766 - ERROR - tvb.core.services.operation_service - arrays used as indices must be of integer (or boolean) type
Traceback (most recent call last):
File "/WORK/TVB/tvb-root/framework_tvb/tvb/core/services/operation_service.py", line 337, in initiate_prelaunch
result_msg, nr_datatypes = adapter_instance._prelaunch(operation, unique_id, available_space, **params)
File "/WORK/TVB/tvb-root/framework_tvb/tvb/core/adapters/abcdisplayer.py", line 79, in _prelaunch
return self.launch(**kwargs), 0
File "/WORK/TVB/tvb-root/framework_tvb/tvb/adapters/visualizers/connectivity.py", line 114, in launch
global_params, global_pages = self.compute_connectivity_global_params(input_data, surface_data)
File "/WORK/TVB/tvb-root/framework_tvb/tvb/adapters/visualizers/connectivity.py", line 183, in compute_connectivity_global_params
minimum, maximum, minimum_non_zero = self._compute_matrix_extrema(input_data.ordered_weights)
File "/WORK/TVB/tvb-root/scientific_library/tvb/datatypes/connectivity_framework.py", line 200, in ordered_weights
return self.weights[permutation, :][:, permutation]
IndexError: arrays used as indices must be of integer (or boolean) type