{"record":{"id":"bb2eaeb71bf593bf","repo":"Yalantis/uCrop","slug":"load-other-failed-to-open-file-s","errorCode":null,"errorMessage":"load_other(): Failed to open file '%s'.","messagePattern":"load_other\\(\\): Failed to open file '(.+?)'\\.","errorType":"exception","errorClass":"CImgIOException","httpStatus":null,"severity":"error","filePath":"ucrop/src/main/jni/CImg.h","lineNumber":60172,"sourceCode":"        throw CImgArgumentException(_cimg_instance\n                                    \"load_other(): Specified filename is (null).\",\n                                    cimg_instance);\n\n      const unsigned int omode = cimg::exception_mode();\n      cimg::exception_mode(0);\n      try { load_magick(filename); }\n      catch (CImgException&) {\n        try { load_imagemagick_external(filename); }\n        catch (CImgException&) {\n          try { load_graphicsmagick_external(filename); }\n          catch (CImgException&) {\n            try { load_cimg(filename); }\n            catch (CImgException&) {\n              try {\n                cimg::fclose(cimg::fopen(filename,\"rb\"));\n              } catch (CImgException&) {\n                cimg::exception_mode(omode);\n                throw CImgIOException(_cimg_instance\n                                      \"load_other(): Failed to open file '%s'.\",\n                                      cimg_instance,\n                                      filename);\n              }\n              cimg::exception_mode(omode);\n              throw CImgIOException(_cimg_instance\n                                    \"load_other(): Failed to recognize format of file '%s'.\",\n                                    cimg_instance,\n                                    filename);\n            }\n          }\n        }\n      }\n      cimg::exception_mode(omode);\n      return *this;\n    }\n\n    //! Load image using various non-native ways \\newinstance.","sourceCodeStart":60154,"sourceCodeEnd":60190,"githubUrl":"https://github.com/Yalantis/uCrop/blob/f788b534b48c144edf786c8cddbf0e029e637804/ucrop/src/main/jni/CImg.h#L60154-L60190","documentation":"CImg's load_other() tries to load an image by auto-detecting its format; if it can't even open the file (fopen fails), it throws CImgIOException. This means the file path is wrong, unreadable, or locked. The library closes any attempted handle and rethrows with the filename embedded.","triggerScenarios":"Calling CImg<T>::load(), load_other(), or an image constructor taking a filename where the file cannot be opened for reading ('rb' fopen fails): nonexistent path, no read permission, or a directory path.","commonSituations":"Typos in asset paths in Android JNI code (ucrop bundled assets not copied to a real filesystem path), using an Android content:// URI instead of a file path, missing storage permissions.","solutions":["Verify the file exists at the exact path (std::filesystem::exists or fopen test).","Check read permissions on the file and each parent directory.","On Android, copy assets/ content URIs to a real file path before passing to CImg.","Check the path isn't a directory.","Log the actual filename passed in; check for truncation or encoding issues."],"exampleFix":"// before\nCImg<unsigned char> img(\"/data/data/pkg/cache/photo.png\"); // file may not exist\n// after\nstd::ifstream f(\"/data/data/pkg/cache/photo.png\");\nif (f.good()) { CImg<unsigned char> img(\"/data/data/pkg/cache/photo.png\"); }\nelse { /* handle missing file */ }","handlingStrategy":"try-catch","validationCode":"bool fileReadable(const char* p){ FILE* f=fopen(p,\"rb\"); if(!f) return false; fclose(f); return true; }\n// call: if (!fileReadable(filename)) handle(); else img.load(filename);","typeGuard":"bool isReadableFile(const std::string& p){ return std::filesystem::is_regular_file(p) && !std::filesystem::is_empty(p); }","tryCatchPattern":"try { img.load(filename); } catch (CImgIOException& e) { fprintf(stderr,\"Cannot open image: %s\\n\", e.what()); }","preventionTips":["Resolve Android content:// URIs to real file paths before loading","Request and check storage permissions at runtime","Log the full resolved path before every load","Check file existence and readability before calling load"],"tags":["cimg","file-io","image-loading","jni"],"backgroundTag":"file-not-found","analyzedSha":"f788b534b48c144edf786c8cddbf0e029e637804","analyzedAt":"2026-09-08T08:36:04.887Z","contentChangedAt":"2026-09-08T08:36:04.887Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}