Ssis308 -

Set your SSIS package logging to Verbose. In the SSIS Catalog, right-click the execution, go to Reports → All Executions, and review the Messages pane. Look for the exact string passed to the File System Task.

Note: This section applies when “SSIS‑308” is a product part number (e.g., from a supplier like Digi‑Key, Mouser, or a proprietary OEM). If you meant something else, feel free to ignore this part.

Error: Package fails when FilePath = \\Server\Share\Folder\ (trailing slash). Why: The File System Task often combines path and file name as Path + FileName. If FileName is empty, you get \\Server\Share\Folder\ which is a directory, not a file. Fix: In your expression, use: ssis308

@[User::FolderPath] + "\\" + @[User::FileName]

And ensure FileName is never empty. Use a conditional split or a derived column to filter nulls.

Add a Script Task (C#) before your File System Task with the following code: Set your SSIS package logging to Verbose

public void Main()
string path = Dts.Variables["User::FilePath"].Value.ToString();
if (string.IsNullOrWhiteSpace(path))
Dts.Events.FireError(0, "Path Check", "Path is null or empty", "", 0);
    Dts.TaskResult = (int)ScriptResults.Failure;
    return;
if (path.IndexOfAny(System.IO.Path.GetInvalidPathChars()) != -1)
Dts.Events.FireError(0, "Path Check", "Path contains invalid characters: " + path, "", 0);
    Dts.TaskResult = (int)ScriptResults.Failure;
    return;
if (!System.IO.Directory.Exists(System.IO.Path.GetDirectoryName(path)))
Dts.Events.FireError(0, "Path Check", "Directory does not exist: " + System.IO.Path.GetDirectoryName(path), "", 0);
    Dts.TaskResult = (int)ScriptResults.Failure;
    return;
Dts.TaskResult = (int)ScriptResults.Success;

This will pinpoint exactly why the path is failing.

Temporarily replace your variable expression with a literal path like C:\Temp\test.txt. If the package works, the error is in your expression or variable population. If it still fails, it is a permission or environment issue. Note: This section applies when “SSIS‑308” is a

Let’s examine three common production scenarios where ssis308 appears.

SSIS evaluates expressions at runtime. If you have a variable like User::FilePath set to "C:\Data\" + @[User::FileName], but User::FileName is NULL or an empty string, the resulting path becomes "C:\Data\" (trailing slash) or "C:\Datanull". Neither is valid.