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

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Syed Ahsan Ali Bokhari