When you have a directory containing multiple CADRG files without a TOC file, you can use the TLcdCADRGDirectoryModelDecoder to decode the whole directory into a single ILcdModel.

A CADRG data set typically consists of multiple files and a single TOC file. If your data set comes with a TOC file, it is recommended to use the TLcdCADRGModelDecoder instead and use it to decode the TOC file.