I was given two volumes in gipl format (image and labelmap), that I can open with ITKsnap without any problem. When I drag and drop them into Slicer, first it suggests to load them as ‘Scalar Overlay’ as oppose to ‘Volume’. Regardless of what’s chosen, Slicer stalls. This happens with both stable 4.10 and r27623 on windows 10.
Same volumes exported as NRRD from ITK-Snap loads fine.
Since DICOM files can have any file extensions, when Slicer loads a file, it checks if it can be interpreted as a DICOM file, by calling GDCMImageIO::CanReadFile(const char *filename). For the attached file, this check takes several minutes, as hundreds of errors are logged. After the check is completed and GDCM library finally realizes that it is not a DICOM file and the file is loaded correctly.
Until it gets fixed, I would recommend not to use gipl file format. In general, it is probably better to use more common file formats (nrrd, mha, maybe nifti).