I am trying to make a  historical run using GFDL-ESM2M GCM historical data. I am getting error for sst file

No such file or directory                                                      
 mod_sst_gnmnc.F90 :      228:Error opening ./DATA/SST/ts_Amon_GFDL-ESM2M_historical_r1i1p1_196601-197012.nc:        

 

while this SST file is present in the direcotory

 

DATA/SST/ts_Amon_GFDL-ESM2M_historical_r1i1p1_196601-197012.cdf

 

Is the data format nc/cdf causing so?

 

Ahsan