Do software upgrades affect the validity of the CE Mark?

There has been much debate on this subject, and the consensus to date suggests that software changes should be considered in assessing whether a re-evaluation for EMC is necessary. From an emissions perspective, the equipment should have been exercised to a maximum extent, possibly by the use of a special program. Analysis may show that the new software does not exercise the equipment to a greater extent than that tested originally. However, changes in software can affect susceptibility, particularly to transients.