I have filed several reports after the crashes, I included the log file from the Apple crash report with the most recent. My next plan is to uninstall the Izotope products that have put third-party components into /Library/Audio/Plug-Ins/Components and see if that fixes the issue.
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@borate Is there an email address I can use for this?
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I have an update. If I remove all the 3rd party AU plugins WavePad then there are no problems. On doing more work I have found that the issue is RX Elements 10, there is no issue with RX Elements 7 which is the other version I have.
BUT......
RX Elements 7 and Ozone 9 AUs start up but they don't seem to get the feed from WavePad as nothing appears in the plugin window or any audible difference to the sound when I listen to it - no levels change if I play with the gain settings on the plugins.