Not a recognised BrainLab iPlan file!

BeamScheme identified this as a BrainLab iPlan dose plane file but encountered an error opening it. Try opening the file in a text editor to check that the file is valid. If you feel that BeamScheme should be able to open this file please raise an issue on https://github.com/alanphys/BeamSchemeV1/issues with a description of the problem and upload a copy of the file.