# 529 error, device remains busy, Thonny or Mu cannot access device

**URL:** <https://forum.makecode.com/t/529-error-device-remains-busy-thonny-or-mu-cannot-access-device/18642>\
**Category:** micro:bit\
**Created:** [March 20, 2023, 5:06pm UTC](https://forum.makecode.com/t/529-error-device-remains-busy-thonny-or-mu-cannot-access-device/18642 "2023-03-20T17:06:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fredeisen](https://avatars.discourse-cdn.com/v4/letter/f/71c47a/32.png) [@fredeisen](https://forum.makecode.com/u/fredeisen)\
**Post date:** [March 20, 2023, 5:06pm UTC](https://forum.makecode.com/t/529-error-device-remains-busy-thonny-or-mu-cannot-access-device/18642/1 "2023-03-20T17:06:38Z")

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I am stucked completely.

Device is busy or does not respond. Your options:

- wait until it completes current work;
- use Ctrl+C to interrupt current work;
- use Stop/Restart to interrupt more and enter REPL.

# DAPLink Firmware - see [https://daplink.io](https://daplink.io)

Build ID: v0257-gc782a5ba (gcc)  
Unique ID: 99063602000528204a19d635a2b99711000000006e052820  
HIC ID: 6e052820  
Auto Reset: 1  
Automation allowed: 0  
Overflow detection: 0  
Incompatible image detection: 1  
Page erasing: 0  
Daplink Mode: Interface  
Interface Version: 0257  
Bootloader Version: 0257  
Git SHA: c782a5ba907377658bc28aa8d132a0fa44543687  
Local Mods: 0  
USB Interfaces: MSD, CDC, HID, WebUSB  
Bootloader CRC: 0x725bea7d  
Interface CRC: 0xe561f1de  
Remount count: 0  
URL: [https://microbit.org/device/?id=9906&v=0257](https://microbit.org/device/?id=9906&v=0257)

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<div class="post-metadata">

**Author:** ![dsssssssss9](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/dsssssssss9/32/861_2.png) [@dsssssssss9](https://forum.makecode.com/u/dsssssssss9)\
**Post date:** [March 20, 2023, 5:26pm UTC](https://forum.makecode.com/t/529-error-device-remains-busy-thonny-or-mu-cannot-access-device/18642/2 "2023-03-20T17:26:50Z")

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HI  
Welcome

More details please?  
The more details the more likely we can help!

What programming language & editor  
What operating system?  
Example of code that produces this error  
Has this always happened or just recently?

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<div class="post-metadata">

**Author:** ![fredeisen](https://avatars.discourse-cdn.com/v4/letter/f/71c47a/32.png) [@fredeisen](https://forum.makecode.com/u/fredeisen)\
**Post date:** [March 23, 2023, 5:11pm UTC](https://forum.makecode.com/t/529-error-device-remains-busy-thonny-or-mu-cannot-access-device/18642/3 "2023-03-23T17:11:04Z")

</div>

Hi,

In the meantime I have got the microbit working again by loading several hex files I have got from the internet.

I am not sure which one has cured my problem

Thanks any way to response.

Best reagrds,

Fred

 ![91C94D6108274482A6218E76FC7C40C1.png](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/2X/7/7e4f006e600be0e52228c99518845515fe779e3e.png)