Hidden Error

Sometimes we look at a trace or log and instead of Error Messages (page 299) we only see their “signs” such as a DLL load event for an error or fault reporting module or a module that is related to symbol files such diasymreader.dll. This pattern is called by analogy to Hidden Exception (Volume 1, page 271) in memory dump analysis pattern catalogue although sometimes we can see such modules in memory dump Module Collection (page 162). For example, the presence of diasymreader module may signify an unreported .NET exception and suggest a dump collection strategy.