<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><FONT class="Apple-style-span" face="Times New Roman" size="5"><SPAN class="Apple-style-span" style="font-size: 18px;">I used "sdfopen rain.nc" to open a nectcdf file. The message is:</SPAN></FONT><BR><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Scanning self-describing file: rain.nc</DIV><DIV>Found 1 data variables in SDF file.</DIV><DIV>Found displayable variable rain with 0 levels in SDF file.</DIV><DIV>SDF operational error (copy_io_std failed making current first)</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><FONT class="Apple-style-span" face="Times New Roman" size="5"><SPAN class="Apple-style-span" style="font-size: 18px;">"ncdump -h rain.nc", get:</SPAN></FONT></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>netcdf rain {</DIV><DIV>dimensions:</DIV><DIV> time = UNLIMITED ; // (1 currently)</DIV><DIV> lat = 64 ;</DIV><DIV> lon = 128 ;</DIV><DIV>variables:</DIV><DIV> float RAIN(time, lat, lon) ;</DIV><DIV> RAIN:long_name = "atmospheric rain" ;</DIV><DIV> RAIN:units = "mm/s" ;</DIV><DIV> RAIN:cell_method = "time: mean" ;</DIV><DIV> RAIN:_FillValue = 1.e+36f ;</DIV><DIV> RAIN:missing_value = 1.e+36f ;</DIV><DIV> float lat(lat) ;</DIV><DIV> lat:long_name = "coordinate latitude" ;</DIV><DIV> lat:units = "degrees_north" ;</DIV><DIV> float lon(lon) ;</DIV><DIV> lon:long_name = "coordinate longitude" ;</DIV><DIV> lon:units = "degrees_east" ;</DIV><DIV> float time(time) ;</DIV><DIV> time:long_name = "time" ;</DIV><DIV> time:units = "days since 1998-02-01 00:00:00" ;</DIV><DIV> time:calendar = "noleap" ;</DIV><DIV> time:bounds = "time_bounds" ;</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I used v1.8SL11 32-bit gradsnc on IBM AIX at NCAR. I met the same problem on another machine. Any idea on what's the problem?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>thanks,</DIV><DIV>Jiangfeng</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV></BODY></HTML>