Tuesday, 26 February 2013

IIS Application browsing error " Oracle.DataAccess Incorrect Format"

Error : Could not load file or assembly 'Oracle.DataAccess' or one of its dependencies. An attempt was made to load a program with an incorrect format.

Solution :

In the IIS Manager select your server and select "Application Pools". Select the application pool used by your Web App and click on "Advanced Settings" from the right hand menu.
In the "General Section" of the advanced Settings click on the "Enable 32-bit Applications" and set it to

This fix only applies to 64-bit servers that attempt to execute the 32-bit version of the Oracle Dlls.

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