[netcdf-java] Cant read ...: not a valid CDM file.

• To: netcdf-java@xxxxxxxxxxxxxxxx
• Subject: [netcdf-java] Cant read ...: not a valid CDM file.
• From: David Rush <david.rush@xxxxxxx>
• Date: Tue, 25 Jul 2017 12:50:01 -0600

Hi.  I'm completely new to netcdf and have been given some netcdf data to
read.

I'm using netcdfAll-4.6.10.jar

I found the example program in the tutorial and have implemented something
very similar:

import ucar.nc2.NetcdfFile;

public class ReadNetCDF {

  public static void main(String[] args) throws Exception {
    ReadNetCDF x = new ReadNetCDF();
    x.read("netCDF/example_nc");
  }

  public void read(String fileName) throws Exception {
    NetcdfFile ncFile = null;
    try {
      ncFile = NetcdfFile.open(fileName);
      System.out.println("ncFile = " + ncFile);
      this.read(ncFile);
    } finally {
      if (ncFile != null) {
        ncFile.close();
      }
    }
  }

  private void read(NetcdfFile nf) throws Exception {
    System.out.println("nf = " + nf);
  }

}

When I run that I get:

Exception in thread "main" java.io.IOException: java.io.IOException: Cant
read netCDF/example_nc: not a valid CDM file.

at ucar.nc2.NetcdfFile.open(NetcdfFile.java:427)

Suggestions?  Is the example_nc file I was given likely corrupt?

David

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• Follow-Ups:
  • Re: [netcdf-java] Cant read ...: not a valid CDM file.
    • From: Christian Ward-Garrison