error in wrf.exe when ndown.exe is used (offline nesting)

Hi,

I am trying to use offline nesting but when I created input files for domain 2 using ndown.exe from WPS-4.1, I am getting following error,

d01 2015-01-05_00:00:00 Error trying to read metadata
d01 2015-01-05_00:00:00 File name that is causing troubles =
d01 2015-01-05_00:00:00
d01 2015-01-05_00:00:00 Error trying to read metadata
d01 2015-01-05_00:00:00 You can try 1) ensure that the input file was created with WRF v4 pre-processors, or
d01 2015-01-05_00:00:00 2) use force_use_old_data=T in the time_control record of the namelist.input file
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 324
---- ERROR: The input file appears to be from a pre-v4 version of WRF initialization routines
-------------------------------------------

when i set force_use_old_data = .true. in the nameless.input file, the model runs but it gives following error in the first time step

Timing for Writing output/wrfout_d01_2015-01-05_00:00:00 for domain 1: 14.13090 elapsed seconds
d01 2015-01-05_00:00:00 Error trying to read metadata

Regards,

--ufuk

The introduction of the hybrid vertical coordinate option in WRF version v4.0) has broken the vertical refinement including ndown. This bug has been fixed in WRFV4.1.1. Would you please download WRFV4.1.1 and try again?