Array problems about mdt HOT 1 OPEN

Well, a little bit more of details while I was debugging the code:
The error occurs at:
model.fitting.py > def _process(self, roi_indices, next_indices = None):
(Line 371) x0 = self._codec.encode(self._initial_params[roi_indices], kernel_data_subset)
More in deep:
In cl_function.py
(Line 356) kernels = get_kernels(kernel_source, cl_function.get_cl_function_name())

(Line 349) if key not in self._compilation_cache:
self._compilation_cache[key] = cl.Program(
env.context, kernel_source).build(' '.join(cl_runtime_info.compile_flags))
kernels[env] = getattr(self._compilation_cache[key], function_name)

from mdt.