About a warning in loading data

I’d like to ask u a question about this software when loading data and saving report.

I don’t understand why the software always output the warning?
Is the warning matter?
Can I ignore it?

This error means that loaded image series may be incorrectly scaled. If you load a complete study or patient and some of the series throw this error then you may ignore it (you may have dose report, screenshots, etc. among the series, which don’t define position, scaling, and orientation). However, if you load a single 3D series and you see such error then there is a good chance that the volume will not appear correctly.