diff --git a/misc/dispersion2D-SVD.py b/misc/dispersion2D-SVD.py
index 8cf2826..b76c4cc 100755
--- a/misc/dispersion2D-SVD.py
+++ b/misc/dispersion2D-SVD.py
@@ -303,7 +303,7 @@ kxmaplist = np.concatenate((np.array([0]),np.cumsum(np.linalg.norm(np.diff(klist
 klist = qpms.generate_trianglepoints(kdensity, v3d=True, include_origin=True)*3*math.pi/(3*kdensity*hexside)
 TMatrices_om = TMatrices_interp(freq)
 
-svdres = hexlattice_zsym_getSVD(TMatrices_om=TMatrices_om, epsilon_b=epsilon_b, hexside=hexside, maxlayer=maxlayer,
+svdres = qpms.hexlattice_zsym_getSVD(lMax=lMax, TMatrices_om=TMatrices_om, epsilon_b=epsilon_b, hexside=hexside, maxlayer=maxlayer,
         omega=freq, klist=klist, gaussianSigma=gaussianSigma, onlyNmin=(0 if svdout else svn))
 if svdout:
    ((svUfullTElist, svSfullTElist, svVfullTElist), (svUfullTMlist, svSfullTMlist, svVfullTMlist)) = svdres
diff --git a/qpms/hexpoints.py b/qpms/hexpoints.py
index fcb748b..d53f7b7 100644
--- a/qpms/hexpoints.py
+++ b/qpms/hexpoints.py
@@ -434,23 +434,25 @@ def hexlattice_get_AB(lMax, k_hexside, maxlayer, circular=True, return_points =
         d['u2d_tr'] = -tphcdict['points']
         d['self_tr'] = tpdict['points']
     return d
- 
 
-def hexlattice_zsym_getSVD(TMatrices_om, epsilon_b, hexside, maxlayer, omega, klist, gaussianSigma=False, onlyNmin=0):
+from scipy.constants import c
+
+def hexlattice_zsym_getSVD(lMax, TMatrices_om, epsilon_b, hexside, maxlayer, omega, klist, gaussianSigma=False, onlyNmin=0):
+    nelem = lMax * (lMax + 2)
     n2id = np.identity(2*nelem)
     n2id.shape = (2,nelem,2,nelem)
     nan = float('nan')
     k_0 = omega * math.sqrt(epsilon_b) / c
-    tdic = qpms.hexlattice_get_AB(lMax,k_0*hexside,maxlayer)
+    tdic = hexlattice_get_AB(lMax,k_0*hexside,maxlayer)
     a_self = tdic['a_self'][:,:nelem,:nelem]
     b_self = tdic['b_self'][:,:nelem,:nelem]
     a_u2d = tdic['a_u2d'][:,:nelem,:nelem]
     b_u2d = tdic['b_u2d'][:,:nelem,:nelem]
     a_d2u = tdic['a_d2u'][:,:nelem,:nelem]
     b_d2u = tdic['b_d2u'][:,:nelem,:nelem]
-    unitcell_translations = tdic['self_tr']*hexside*s3
-    u2d_translations = tdic['u2d_tr']*hexside*s3
-    d2u_translations = tdic['d2u_tr']*hexside*s3
+    unitcell_translations = tdic['self_tr']*hexside*_s3
+    u2d_translations = tdic['u2d_tr']*hexside*_s3
+    d2u_translations = tdic['d2u_tr']*hexside*_s3
     
     if gaussianSigma:
         unitcell_envelope = np.exp(-np.sum(tdic['self_tr']**2,axis=-1)/(2*gaussianSigma**2))