[Option] /VLog[Filespec] [Description] 
(Optional). Writes all Integration Services package events to the log providers that were enabled when the package was designed. To have Integration Services enable a log provider for text files and write log events to a specified text file, include a path and file name as the Filespec parameter. If you do not include the Filespec parameter, Integration Services will not enable a log provider for text files. Integration Services will only write log events to the log providers that were enabled when the package was designed.