diff --git a/qpms/__init__.py b/qpms/__init__.py
index c2d880c..fc034d4 100644
--- a/qpms/__init__.py
+++ b/qpms/__init__.py
@@ -3,5 +3,5 @@ __version__ = get_distribution('qpms').version
 
 from qpms_c import *
 from .qpms_p import *
-from .lattices import *
+from .lattices2d import *
 from .hexpoints import *
diff --git a/qpms/hexpoints.py b/qpms/hexpoints.py
index 405a82a..063c113 100644
--- a/qpms/hexpoints.py
+++ b/qpms/hexpoints.py
@@ -437,7 +437,7 @@ def hexlattice_get_AB(lMax, k_hexside, maxlayer, circular=True, return_points =
 
 from scipy.constants import c
 from .timetrack import _time_b, _time_e
-from .qpms_p import symz_indexarrays
+from .tmatrices import symz_indexarrays
 
 def hexlattice_zsym_getSVD(lMax, TMatrices_om, epsilon_b, hexside, maxlayer, omega, klist, gaussianSigma=False, onlyNmin=0, verbose=False):
     btime = _time_b(verbose)
diff --git a/qpms/hexpoints_c.pyx b/qpms/hexpoints_c.pyx
index da5912f..ebcf0fb 100644
--- a/qpms/hexpoints_c.pyx
+++ b/qpms/hexpoints_c.pyx
@@ -7,7 +7,7 @@ cdef double _s3 = math.sqrt(3)
 
 from scipy.constants import c
 from .timetrack import _time_b, _time_e
-from .qpms_p import symz_indexarrays
+from .tmatrices import symz_indexarrays
 from .hexpoints import hexlattice_get_AB
 
 cpdef hexlattice_zsym_getSVD(int lMax, TMatrices_om, double epsilon_b, double hexside, size_t maxlayer, double omega, klist, gaussianSigma=False, int onlyNmin=0, verbose=False):
diff --git a/qpms/scattering.py b/qpms/scattering.py
index 3cb317b..2344253 100644
--- a/qpms/scattering.py
+++ b/qpms/scattering.py
@@ -185,6 +185,7 @@ class Scattering(object):
 
 class LatticeScattering(Scattering):
     def __init__(self, lattice_spec, k_0, zSym = False):
+        pass
 
 
 """
diff --git a/qpms/translations.c b/qpms/translations.c
index 56e5d5c..ae29c19 100644
--- a/qpms/translations.c
+++ b/qpms/translations.c
@@ -1574,7 +1574,9 @@ int qpms_cython_trans_calculator_get_AB_arrays_loop(
         while(local_indices[ax] == innerloop_shape[ax] && ax >= 0) {
           // overflow to the next digit but stop when reached below the last one
           local_indices[ax] = 0;
-          local_indices[--ax]++;
+          //local_indices[--ax]++; // dekrementace indexu pod nulu a následná inkrementace poruší paměť FIXME
+          ax--;
+          if (ax >= 0) local_indices[ax]++;
         }
         if (ax >= 0) // did not overflow, get back to the lowest index
           ax = resnd - 1;
diff --git a/setup.py b/setup.py
index 1208c69..4ebef4d 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@ qpms_c = Extension('qpms_c',
             'qpms/gaunt.c',#'qpms/gaunt.h','qpms/vectors.h','qpms/translations.h',
             # FIXME http://stackoverflow.com/questions/4259170/python-setup-script-extensions-how-do-you-include-a-h-file
             'qpms/translations.c'],
-        extra_compile_args=['-std=c99','-ggdb','-O3',
+        extra_compile_args=['-std=c99','-ggdb', '-O0',
             '-DQPMS_COMPILE_PYTHON_EXTENSIONS', # this is required
             #'-DQPMS_USE_OMP',
             '-DDISABLE_NDEBUG', # uncomment to enable assertions in the modules
@@ -35,7 +35,7 @@ qpms_c = Extension('qpms_c',
         )
 
 setup(name='qpms',
-        version = "0.2.15",
+        version = "0.2.99",
         packages=['qpms'],
 #        setup_requires=['setuptools_cython'],
         install_requires=['cython>=0.21','quaternion','spherical_functions','py_gmm'],