ASSIMP exporting an imported scene without any changes throws exception - c++

Question

I am working on a project where I import a 3D mesh of an avatar using ASSIMP library, update it and export the updated scene again using the same ASSIMP library. To achieve this, as the first step, I have written a code to import a scene and without making any changes I am passing the reference to the export function. But, the export function throws me an error. The main function is as follows (you can verify that I am not making any changes to the imported scene):
int main(int argc, char** argv)
{
string filename = "../Content/PinocchioMesh/Model1.obj";
Assimp::Importer Importer;
//Importer.
cout << "\tReading file using ASSIMP" << endl;
const aiScene* aiscene = Importer.ReadFile(filename.c_str(), aiProcess_JoinIdenticalVertices | \
aiProcess_GenSmoothNormals | aiProcess_FlipUVs | aiProcess_SortByPType | aiProcess_Triangulate);
string str = Importer.GetErrorString();
if (!aiscene) {
printf("Error parsing '%s': '%s'\n", filename.c_str(), Importer.GetErrorString());
return false;
}
Assimp::Exporter exporter;
const aiExportFormatDesc* format = exporter.GetExportFormatDescription(0);
int lIndex = filename.find_last_of('/');
//const string path = Filename.substr(0,lIndex+1);
string path = "../Content/PinocchioMesh/";
cout << "\tExport path: " << path << endl;
aiReturn ret = exporter.Export(aiscene, format->id, path, aiscene->mFlags);
cout << exporter.GetErrorString() << endl;
return 0;
}
The error is in the Export() function ans says:
First-chance exception at 0x1052591B (Assimp32.dll) in ImportRigExport.exe: 0xC0000005: Access violation reading location 0x00000000.
If anyone has used assimp to export scenes, please help me.

Answer 1

It seems path doesn't include a file name, only the directory part, so that for export() is unlikely to be able to create an output file. Nevertheless, I agree, Assimp should manage this error case.