File could not be created as the directory specified for the file creation is not valid.(SBL-EAI-50228)
This error can occur while executing Send Method of EAI File Transport Business Service. Rest assured it is not related to the file name or windows/network issues. It is due to the added security introduced by Oracle in Siebel 8 which limits the access of the folders to write by EAI File Transport business service.
By default service does not have access to the file system, to add exception add following snippet in cfg file:
EAIFileTransportFolders = C:\\
More info from bookshelf
Hope it helps.