i want to know netcdf error

attach a files are two nc files and coding hwp file

1)sea surface height anom sep_2009_nov.nc 2)sea surface hght anom 2012-oct.nc

when i coding first files it' ok

But when i coding second files, it happens error,,

------------------------------------------------------------------------------------------------------------- Error using netcdflib The NetCDF library encountered an error during execution of 'inqVar' function - 'Variable not found (NC_ENOTVAR)'.

Error in netcdf.inqVar (line 26) [varname,xtype,dimids,natts] = netcdflib('inqVar', ncid, varid); -----------------------------------------------------------------------------------------------------------------

i don't know why this errors happen

help me please

[Geoff Hayes]

Kim - What are the lines of code that you are using to read these files?