ssis_zip_step3.cs

// If error, write to log and fail
if (
        // Error conditions:
        (!(Dts.Variables["vExitCode"].Value.ToString() == "0"))         // If exit code = 0
        || exceptionTxt.Length > 0                                      // Or an exception was captured above
        || Dts.Variables["vStdError"].Value.ToString().Length > 0       // Or StdError was captured above
    )
{
    string err1 = Dts.Variables["vStdError"].Value.ToString();
    string err2 = exceptionTxt;
    string errFinal = "";
    if (err1 != null)
    {
        errFinal += err1.Trim() + System.Environment.NewLine;
    }
    if (err2 != null)
        errFinal += err2.Trim();

    Dts.Events.FireError(0, "7Zip Error", errFinal, string.Empty, 0);
}