Hi Albert, Please see my response below https://developer.apple.com/forums/thread/771782?answerId=819899022#819899022 as I needed to type more than 500 characters. Thanks, Wayne

#0 0x000000010346abc0 in exchg_registrar::exchg_registrar() () #1 0x00000001b5f0fbdc in invocation function for block in dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const () #2 0x00000001b5f5ed08 in invocation function for block in dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&, dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int) block_pointer, void const*) const () ...

Hi @eskimo, fieldwire is our app. We ran the app attached to Xcode and we think the stack trace shown there is symbolicated and it does look pretty much the same as what the crash report shows. exchg_registrar from frame 0 is not written by us even though it's called from our app fieldwire. Following this post is the stack trace that Xcode showed us. It looks like a dynamic loader's problem, is there any way to determine what library it's trying to load when it fails?

Hi @eskimo you are right, fieldwire is ours. I will look into the article that you shared and see if it helps, thanks!