CODEWITHSUNDEEP
c#
Khyati Agrawal
Khyati Agrawal

Reputation: 39

A first chance exception of type 'System.OutOfMemoryException' occurred in mscorlib.dll

I am new to C# and trying to read a .sgy file that contains seismic data. I found out a library known as Unplugged.SEGY for reading the file. My file is of 4.12Gb,I am getting " A first chance exception of type 'System.OutOfMemoryException' occurred in mscorlib.dll" and then the program stops suddenly. This is the my code

using System;   
using Unplugged.Segy;  
namespace ABC   
{  
    class abc       
    {  
        static void Main(String[] args)  
        {      
            var reader = new SegyReader();  
            ISegyFile line = reader.Read(@"D:\Major\Seismic.sgy");   
            ITrace trace = line.Traces[0];   
            double mean = 0;   
            double max = double.MinValue;   
            double min = double.MaxValue;    
            foreach (var sampleValue in trace.Values)   
            {    
                mean += sampleValue / trace.Values.Count;   
                if (sampleValue < min) min = sampleValue;   
                if (sampleValue > max) max = sampleValue;   
            }  
            Console.WriteLine(mean);  
            Console.WriteLine(min);  
            Console.WriteLine(max);  
        }  
    }  
}

Please Help me out EDIT: I am running the application as 64-bit process

Upvotes: 2

Views: 2225

Answers (1)

Michael Puckett II
Michael Puckett II

Reputation: 6749

Since you are running in 64 bit (and as long as you're in .NET 4.5+) I recommend making sure the gcAllowVeryLargeObjects flag is set to true.

In .NET there are various sizes that can be used in 32 bit applications, capping between 2-4 GB per process. A 64 bit application can consume much more per process.

However; in both 32 bit and 64 bit a single object can only consume 2GB at most.

However; to trump that final statement again, since 4.5 and beyond, you can flag your configuration to allow objects greater than 2GB.

My final thought is that flag needs to be set in your situation.

To have a .NET process greater than 4GB it must be a 64bit process. To have a single object greater than 2GB it must be a 64bit process, running .NET 4.5 or later, and the gcAllowVeryLargeObjects flag is set to true.

Upvotes: 2

Related Questions