Dear all
i install regcm 4.6.0 and when run ./bin/icbc , get this error :

 This is icbc part of the RegCM version 4
   SVN Revision: tag-4.6.0 compiled at: data : Dec 13 2016  time: 19:03:22

 : this run start at    : 2016-12-13 19:08:28+0330
 : it is submitted by   : aaaaa
 : it is running on     : aaaaa-Aspire-V3-571G
 : in directory         : /home/aaaaa/regcm_model/result/runtime
                       
 GLOBIDATE1 : 2015-01-01 00:00:00 UTC         
 GLOBIDATE2 : 2015-02-01 00:00:00 UTC         
 NSTEPS     :          125
 Read static data
 NetCDF: Attribute not found                                                     
 mod_ncep.F90 :      255:Variable air  :scale_factor in file/home/aaaaa/regcm_model/GLOBEDATA/NNRP1/2015/air.2015.nc:          -43

Program aborted. Backtrace:
#0  0x7FAC494A1E08
#1  0x7FAC494A2CE2
#2  0x7FAC4957D488
#3  0x46217A in myabort_
#4  0x48C5B0 in __mod_nchelper_MOD_checkncerr.part.0 at mod_nchelper.F90:?
#5  0x4211A5 in __mod_ncep_MOD_getncep
#6  0x4618F3 in MAIN__ at icbc.F90:?
Aborted (core dumped)

i downloaded NNRP1 data from http://users.ictp.it/~pubregcm/RegCM4/globedat.htm and the 2015 air data volume is 320 Mb.
please help me to solve this problem.
thanks