EOleException error raised with message catastrophic failure or access is denied in Delphi
EOleException error raised with message catastrophic failure or access is denied in Delphi While calling DLLs from my application using safecall, I was getting EOleException error raised with message catastrophic failure. When I switched to stdcall, I started getting EOleException error raised with message access is denied for some calls. So, I thought to dive deep into the root cause of the error and tried to understand what exactly EOleException is in Delphi? As per documentation: EOleException is the exception class for OLE automation errors that occur in methods or properties of an object. EOleException is the exception class for errors specific to the OLE IDispatch interface. EOleException is raised when an error occurs in the middle of a method call from IDispatch. EOleException is generated when a server receives a failure return value from a property or method that was called with the IDispatch interface Invoke method. When an error occurs, objects invoked through IDispatch can