Issue with .mdf file

[ted]

you can solve this issue by using T-SQL :

CREATE DATABASE [YourDatabaseName] ON
(FILENAME = 'C:\123\YourDatabaseName.mdf')
FOR ATTACH_REBUILD_LOG ;

Or, you can also use a stored procedure:

EXEC sp_attach_single_file_db @dbname=' YourDatabaseName',
@physname=N'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQL \MSSQL\DATA\ YourDatabaseName.mdf'
GO

If a single log file is missing.

Good Luck!