Hi Ashok Sridhar,
There is a slight change in the format of your OQL query that should be done. When using parameters quotation marks are not required as part of the query and also the "*" characters should be part of the parameter passed when using wildcards.
Here is a modified version of your query that should not do any problems when executed:
emp FROM EmployerExtent AS emp WHERE emp.EmployerName LIKE $1
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