Hi,
This might be related to a bug where VisualGDB would not pass the target selection flags to the IntelliSense engine. Please try this build: VisualGDB-5.6.1.4051.msi
If it doesn’t solve the problem, please try checking the CppEngineTuningInfo.xml file. It contains a list of rules for determining the target based on the preprocessor flags discovered from the project. Please let us know if your target is listed there and the flags shown in View->Clang IntelliSense Status->Project Structure match any of the targets defined in CppEngineTuningInfo.xml.