Hi! I understand you’re experiencing a crash with the SDS-x app when assigning a 4-6 minute playtrack on your iPad Air. Let’s work through this step-by-step to figure out the cause and find a solution.

First, just to clarify:
- Are you running the latest version of the SDS-x app installed from the App Store?
- Is your iPad Air updated to the latest iPadOS version?
- Does the app crash only when assigning playtracks of that duration, or with shorter/longer tracks too?
- Have you tried restarting your iPad or reinstalling the app?

Meanwhile, here are some initial steps that often help with app crashes on iPads:

1. Force Close and Reopen the App:
Swipe up from the bottom and hold to open the app switcher, then swipe the SDS-x app off the screen to close it. Reopen it to check if the issue persists.

2. Restart Your iPad:
Hold down the power button and slide to power off, wait 30 seconds, then turn it back on.

3. Check for Updates:
Go to the App Store and iPad settings to ensure both your app and iPadOS are fully updated.

4. Clear App Cache (if available):
Some apps have settings to clear cache or data without uninstalling; check SDS-x app settings for that.

5. Reinstall the App:
If updating did not help, uninstall and then reinstall the SDS-x app to clear corrupted data.

6. Try a Different Audio File:
The specific playtrack file might be corrupted or unusable by the app. Test with another 4-6 minute audio file to see if the crash still happens.

If you’ve already done some of these and the crash still happens only with 4-6 minute tracks, it might be related to app memory handling or a bug with playtrack assignments of that length.

In that case, here are some advanced tips:

- Try assigning smaller segments of the track (e.g., less than 4 minutes) to see if it’s length-specific.
- Look into available app settings about memory or cache limits related to playtracks.
- If the problem persists, please share which iPadOS version you’re running, and the exact app version.

Let me know what you’ve tried so far and what your setup looks like, so I can assist you further!

Also, in the meantime, you might find this Apple support article helpful for general app crashes:
https://support.apple.com/en-us/HT201411[3]

Are you able to try those steps now?