If an error occurs on the client side during synchronization, the client may send its output file to the server and the server will store this output file to a file specified using the server command line option -e or -et. However, if the MobiLink server could not open this file for writing, it will show this warning message and will write the remote log into its message log file or messages window. To avoid this warning, please make sure the MobiLink server has the privilege to write the file.