Unreferenced property in customize emitter plugin

[yangocean-sudo]

Hi, as we discussed before, we are going to create a customise "photon emitter" that can read the input binary file and then emit the rays.
It works fine for my local computer. It is a mac with Intel Core, and the variant I used is
llvm_ad_rgb.
Now I'm trying to test this emitter in the school remote GPU machine, and the variant I need to use is cuda_mono, and when I read the XML file from jupyter notebook, it shows:

RuntimeError                              Traceback (most recent call last)
Input In [2], in <cell line: 1>()
----> 1 scene = mi.load_file("./two_mirrors.xml")
      2 original_image = mi.render(scene)
      3 import matplotlib.pyplot as plt

RuntimeError: ​[xml.cpp:1157] Error while loading "./two_mirrors.xml" (near line 46, col 6): unreferenced property "["filename"]" in emitter plugin of type "photon_emitter"

I noticed that the file envmap.cpp is worthy of reference, and I try to be consistent with the way it reads files. And this is my snippet code to read the file

if (props.has_property("filename"))
            std::cout << "Reading file..." <<std::endl;
// Read the file
FileResolver *fs = Thread::thread()->file_resolver();
fs::path file_path = fs->resolve(props.string("filename"));
m_filename = file_path.filename().string();
ref<FileStream> fileStream = new FileStream(file_path, FileStream::ERead);

Did I miss anything? Thank you for your time.

[njroussel]

Hi @yangocean-sudo

No, this all seems correct. Since this code also works on your local machine, this sounds like an environment issue on the remote machine. Check the mitsuba path with import mitsuba as mi; mi.__path__ to be sure that it is pointing to your custom build.

[yangocean-sudo]

Thank you! The problem is solved by checking the mitsuba path.