Hello, I am using external C++ code on labview. My C++ DLL compiled very well. But , when my labview program arrives to the first call of a DLL function, it generates the following error: ERREUR de type class boost::filesystem::filesystem_error. boost::filesystem::path: invalid name "D:\Documents Johan\Johan\Stitching\Fichiers de mesure\front parfait\13z2" in path: "D:\Documents Johan\Johan\Stitching\Fichiers de mesure\front parfait\13z2". I do not know why this error occurs ?