Shape mismatch error in sigma step

[Agathyan Barathi]

Dear all,

I am learning to calculate exciton polarons in LiF via the example tutorial files given in the EPW 6.0 package

I encountered the following error in the sigma step. Kindly guide me to resolve it.

================================================================================
 12:17:34   Dealing with k =  0.000000  0.000000  0.000000                1 / 64
================================================================================

 Reading vxc.dat
 Number of q-points in the irreducible BZ(k) (nrq): 8
 
 Started calculating Sigma with 24 block(s) at 12:17:34.
forrtl: severe (408): fort: (33): Shape mismatch: The extent of dimension 1 of array WFNKQ is 18 and the corresponding extent of array SIG is 19

Image              PC                Routine            Line        Source            
sigma.cplx.x       00000000005C31E5  sigma                    1425  sigma_main.f90
sigma.cplx.x       0000000000409E4D  Unknown               Unknown  Unknown
libc.so.6          00000B8B5042A1CA  Unknown               Unknown  Unknown
libc.so.6          00000B8B5042A28B  __libc_start_main     Unknown  Unknown
sigma.cplx.x       0000000000409D65  Unknown               Unknown  Unknown