Why does includePath fail?

[xissburg]

I have all paths correctly setup in c_cpp_properties,json under includePath and when I type #include <... it correctly suggests the directories and files under that path but once I finish the statement with ...> the red squiggles appear saying "cannot open source file..." which is inconsistent and shows that this is perhaps fundamentally flawed since I have always experienced this issue. What really is the problem?

[sean-mcmanus]

Is the file mentioned after "cannot open source file..." the same file that was #include'd or a dependency? When you run C/C++: Log Diagnostics, does the "Includes" section appear correct for the TU/source file?

[xissburg]

It complains about the specific file being included. It correctly suggests the file while typing the path after #include but once the statement is completed, it shows the red squiggles. Looking at the C/C++: Log Diagnostics I can see that the paths are missing from the Includes section. Though I am now noticing that it only happens for *.hpp files and not *.cpp files. Am I missing some configuration?

[sean-mcmanus]

If you're using the recursive includes feature (includePath ending with **) then something could be causing that to fail. The current file might have problem being parsed -- does the outline view fail to populate for that file? You may also try running C/C++: Reset IntelliSense Database in case there's some old data in there. You could also try using a non-recursive include path. This assumes you're not using compileCommands or configurationProvider for configuration.

[xissburg]

I am not using recursive include paths. Also the error is inconsistent as it shows up in some files and it doesn't in others. Resetting the database does not cause any changes.

[sean-mcmanus]

Sounds like it might be the same issue as #7701 ? We haven't yet figured out a repro or cause.

[xissburg]

Ok, thanks for the support!