AOS Crash dump analysis - Symbols

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Dear all,

Now that the LCS tool to analyze crash dumps has been discontinued, we are trying to analyze them using WinDbg.

I am capturing crash dumps with WER and then trying to analyze them in WinDbg.

My issue is that the symbols are not loaded and I therefore cannot extract useful information from the dump file. I also have the same behaviour when trying to analyze the dump file with DebugDiag.

I have tried several things:

- Using MS symbol path

- Adding the AOS folder

- Used Tariq Bell's scripts

But none of those work.

Did any of you experience the same difficulties?

We have AX 2012 R2 CU7.

Thanks,

Julien

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Vilmos Kintera 46,149 on at

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You can only use the public symbol files which does not contain a lot of kernel functionality unfortunately, only the Microsoft core team and escalation engineers has access to, so a lot of things cannot be extracted from the dumps.

Getting out useful information from dumps was always black magic/voodoo arts for most of us, that is why the LCS site was created in the first place. I was very disappointed when they have stopped that feature.

If you want to get this resolved in a reliable manner, your best bet is raising a support ticket with Microsoft, and they will provide you with a storage where you could upload the crash dump for analysis. If they discover a product fault then you get a refund, but if it is a different issue, the price was around 400$ last time I checked.

Before you do that, make sure your kernel is patched up, maybe it was already resolved.

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Hi Vilmos,

Thanks a lot for your answer.

Yes, very disappointing as well about the tool being discontinued.

I will check with MS to try to get those dumps analysed.

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Martin Dráb 237,965 Most Valuable Professional on at

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Getting symbols for AX from Microsoft symbol server worked for me, when I used it in past. Review if your setup is correct.

As far as I remember, the AOS folder doesn't contain any symbols, so it won't help.

If you mean scripts provided in Finding the AX user and the X++ call stack from a memory dump the easy way, they assume you've completed the setup documented in Setting up WinDbg and Using Symbols, which also uses Microsoft symbol server. You really have to fix the problem you have with the symbol server.

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Community Member on at

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Hi Martin,

Thanks for your reply.

I have followed all the steps in this blog but am getting the following issue when reloading the symbols:

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Martin Dráb 237,965 Most Valuable Professional on at

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Try to open the link in browser; you should see the Microsoft Symbol Server web page.

Make sure you're connected to internet and the connection isn't blocked by a firewall.

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Community Member on at

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Thanks Martin.

The link is working fine in a WebBrowser and it is loading the symbols (but not the Ax32Serv one) successfully with the following command:

.reload /f

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Martin Dráb 237,965 Most Valuable Professional on at

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Does it mean that the previous error disappeared, or that you're still getting 404 but only for Ax32Serv assembly?

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Community Member on at

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Hi Martin,

I am still getting this 404 error.

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Community Member on at

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Hi Martin, Vilmos,

After speaking to MS support, it looks like the symbols are not available for older kernel versions. I will keep you updated once I install the latest kernel update in our environments in the next couple of months.

Thanks,

Julien

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Vilmos Kintera 46,149 on at

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Thanks, keep us posted. In the meanwhile since now the LCS crash dump analysis is not available I am thinking of publishing a Crash troubleshooting guide blog entry later this week based on Tariq's articles, and see how it goes and what could be extracted. Will link it once completed.

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