Error in "Import excel to database" component in process model

error is : ???An object or column name is missing or empty. For SELECT INTO statements, verify each column has a name. For other statements, look for empty alias names. Aliases defined as "" or [] are not allowed. Change the alias to a valid name.??? 

I have an excel with 4 columns   and my database has table with columns 

Column names are same. I don't understand the error. File name I am passing as process variable. Number of columns to be read is 4 as i have 4 columns in file. Table name is my datatype name and data source is jdbc/mydatabase. What am I missing? 

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