An object or column name is missing or empty error when uninstalling setup by wix

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C#

SQL-Server

C#4.0

I have developed a custom action to execute each query in sqlserver script file.Its working fine
and installation of the setup working fine with out any issues.

Here is the approach i followed,script file in project having default database name,once i eneterd any database name in control which is edit type,renaming the database name with default databse name in script file and executing each query in script file.

Now my problem is ,whne i unistall the setup in program files,its show error as below

Error Message:
An object or column name is missing or empty.For SELECT INTo statments,verifyeach column has a name.For other statements,look for emptyalias names.Aliases defined as"" or [] are not allowed.Chnage the alias to a valid name.

I tired to solve it,but could not figure any solution and why its happening.is it some thing wrong am doing ?? any idea to solve this issue. any guidance will be grateful.

Thanks in advance...