Summary: 

User is receiving error when exporting to Excel file.

Symptoms: 


User is receiving error when exporting to Excel, dashboard and exporting to PDF is working fine.

In logs you can see error:

Unsupported major.minor version 


Cause:

Basically it means that JRE version is not supported.
Verify if JRE path('JavaPath') is correct in DB.
In my case entry was not there so I need to insert manually and perform Metadata refresh


Resolution: 

Verify if JRE path('JavaPath') is correct in DB.
SET IDENTITY_INSERT custom_sysparams ON

INSERT INTO custom_sysparams (Parm_id, Parm_CreatedBy, Parm_CreatedDate, Parm_UpdatedBy, Parm_UpdatedDate, Parm_TimeStamp, Parm_Deleted, Parm_Name, Parm_Value, Parm_Component)
VALUES ('1546', '-1', '2015-04-20 17:12:22.000', NULL, '2015-04-20 17:12:22.000', '2015-04-20 17:12:22.000', NULL, 'JavaPath', 'D:\APPS\Sage CRM\CRM\Services\JRE\jre7\bin\', NULL);

SET IDENTITY_INSERT custom_sysparams OFF

Make sure you replace "C:\Program Files\Sage CRM\CRM\Services\JRE\jre7\bin\" with correct path.