---
title: "[WIZ1xxSR] 10048 runtime error occurs when running Configuration Tool"
url: "https://maker.wiznet.io/forum/9242"
markdown_url: "https://maker.wiznet.io/forum/9242/md"
type: "Forum topic"
category: "General"
author: "WIZnet"
created: "2021-11-09T23:24:27+09:00"
last_activity: "2024-05-13T19:53:43+09:00"
language: "en"
views: 542
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# [WIZ1xxSR] 10048 runtime error occurs when running Configuration Tool

## Question

Asked by WIZnet on 2021-11-09 in General.

When running the WIZ1xxSR Configuration Tool, 10048 runtime error occurs sometimes.

This occurs when the port used by the Config tool is already in use by the system.

WIZ1xxSR Configuration Tool uses port 5001 by default. Refer to the below link for details.

- [WIZ100SR/ WIZ105SR/ WIZ110SR Programmer’s Guide](https://www.wiznet.io/wp-content/uploads/wiznethome/S2E%20Module/WIZ100-105-110SR/Document/WIZ1x0SR_AN_S2E-Programming-Guide_V030E.pdf)

To solve the problem, find the process using the port and terminate it.

After launching the command prompt, enter the following command.

```
# Check program PID using port 5001
cmd> netstat -ano | findstr ":5001"

# Terminate process
cmd> tasklist /FI "PID eq xxxx"
```

---

Source: https://maker.wiznet.io/forum/9242