The warnings have been fixed. The ALPUG plugin now supports metadata (a specific file format has been designed for it), supports duplicates in the data files (since this seems to happen quite often) with either no reporting (for limited number of duplicates) and reporting a warning for the begining of a large duplicated block of data. The plugin also now handles better missing files: if some files have already been found for this station, a warning is printed out but the execution continues. If no single file was found for a given station, an exception is thrown. The documentation has also been written.