# BADMD-APP error after replacing USB DOK

**URL:** <https://forum.ripe.net/t/badmd-app-error-after-replacing-usb-dok/1162>\
**Category:** RIPE Atlas\
**Tags:** troubleshooting\
**Created:** [10 September 2024 13:06 UTC](https://forum.ripe.net/t/badmd-app-error-after-replacing-usb-dok/1162 "2024-09-10T13:06:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ldti](https://avatars.discourse-cdn.com/v4/letter/l/4bbf92/32.png) [@ldti](https://forum.ripe.net/u/ldti)\
**Post date:** [10 September 2024 13:06 UTC](https://forum.ripe.net/t/badmd-app-error-after-replacing-usb-dok/1162/1 "2024-09-10T13:06:50Z")

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OK, so after my probe #25838 went offline, I noticed that the status page showed that the USB DOK died.  
I have replaced it, and am now getting a “BADMD-APP” in the SOS log.  
I am assuming this means the downloaded file does not pass the MD5 hash check?

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**Author:** ![robertk](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.ripe.net/robertk/32/413_2.png) [@robertk](https://forum.ripe.net/u/robertk)\
**Post date:** [11 September 2024 08:10 UTC](https://forum.ripe.net/t/badmd-app-error-after-replacing-usb-dok/1162/2 "2024-09-11T08:10:28Z")

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Hello, I see that probe has connected since then, so this was just a temporary state.

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**Author:** ![ldti](https://avatars.discourse-cdn.com/v4/letter/l/4bbf92/32.png) [@ldti](https://forum.ripe.net/u/ldti)\
**Post date:** [11 September 2024 08:22 UTC](https://forum.ripe.net/t/badmd-app-error-after-replacing-usb-dok/1162/3 "2024-09-11T08:22:00Z")

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Thanks. I suspect it was related to yesterdays outage.