CRM 2011:The import file is too large to upload.

The error indicates that the file size was above the default max import file size of 8 MB. In order to change 

the default setting please apply the following steps.

Step 1:-

1.Click Start, click Run, type regedit, and then click OK.

2.Locate the following registry subkey:

HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ MSCRM

3.Right-click MSCRM, point to New, and then click DWORD Value to create a new DWORD value.

4.Rename the DWORD value to the following value:

OLEDBTimeout

5.Right-click the DWORD value, and then click Modify.

6.In the Edit DWORD Value dialog box, type 86400 in the Value data box, click Decimal in the Base option, and then click OK. 

7.Right-click MSCRM, point to New, and then click DWORD Value to create a new DWORD value.

8.Rename the DWORD value to the following value:

ExtendedTimeout

9.Right-click the DWORD value, and then click Modify.

10.In the Edit DWORD Value dialog box, type 1000000 in the Value data box, and then click OK. 

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a- Open Web.Config file for CRM web Application

1. locate the following line.
   
   

   <httpRuntime executionTimeout="300" maxRequestLength="8192"/>

   Change executionTimeout="3600" and change maxRequestLength="20000".

   then locate the following line.

   
   <httpRuntime maxRequestLength="8192"/>
   
   
   

   Change maxRequestLength="20000".
   Save and then close the Web.config file.

Step 2:-    

Verify the current value for the "Max" file size for data upload. By default the value is set to "8".

Use MSCRM_CONFIG
select ColumnName, IntColumn from ServerSettingsProperties
where ColumnName = 'ImportMaxAllowedFileSizeInMB'
Go 

change the default value from 8 to 12.

Use MSCRM_CONFIG
UPDATE [MSCRM_CONFIG].[dbo].[ServerSettingsProperties]
SET [IntColumn] = '12'
WHERE ColumnName = 'ImportMaxAllowedFileSizeInMB'
Go