# Disable PPK checks?

**URL:** <https://forum.qoitech.com/t/disable-ppk-checks/115>\
**Category:** Support\
**Created:** [December 14, 2017, 10:32am UTC](https://forum.qoitech.com/t/disable-ppk-checks/115 "2017-12-14T10:32:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pablo](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@pablo](https://forum.qoitech.com/u/pablo)\
**Post date:** [December 14, 2017, 10:32am UTC](https://forum.qoitech.com/t/disable-ppk-checks/115/1 "2017-12-14T10:32:42Z")

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Is it possible to disable the Otii SW Nordic PPK initialization? I have multiple Nordic DK51 units connected to the computer running the Otii SW and I think I see a behavior that where failed initialization for Nordic PPK kills my other DK51s (and possibly also serial-USB-FTDIs) connected to the computer.

I’m running Debian Stretch and Otii 1.5.3.

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**Author:** ![chrfle](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.qoitech.com/chrfle/32/288_2.png) [@chrfle](https://forum.qoitech.com/u/chrfle)\
**Post date:** [December 14, 2017, 1:08pm UTC](https://forum.qoitech.com/t/disable-ppk-checks/115/2 "2017-12-14T13:08:08Z")

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Currently no. Could you please create a case in the [case system](https://customer.qoitech.com/) and I’ll see if I can add a preference for this quick and easy and attach a binary for you there.

I assume you don’t use the PPK but only want to use Arc?

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**Author:** ![pablo](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@pablo](https://forum.qoitech.com/u/pablo)\
**Post date:** [December 14, 2017, 1:15pm UTC](https://forum.qoitech.com/t/disable-ppk-checks/115/3 "2017-12-14T13:15:28Z")

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Yes. Currently we’re not using the PPK, only bare DK51s as external programmers and radio receivers.