Discontinuation of length measurements deviating from mm
HiCAD 2021 and 2022 only support drawings with the unit of measurement “Millimetres” (mm). The unit of measurement is saved in the corresponding SZA, FGA or KRA file when saving a drawing or a part. Attempts to open drawings with a different unit of measurement or to insert parts with a unit of measurement different from mm will be blocked.

Discontinuation of "old" HiCAD itemisation
As of HiCAD 2019 the "old" itemisation, i.e. the itemisation that was used up to HiCAD 2017, will only be available for model drawings that were already itemized with these functions. From HiCAD 2021 onwards, only the "new" itemization will be supported. Please also read the information given in the HiCAD 2021 News.

Discontinuation of "old" OpenGL versions
From HiCAD 2021 on, only OpenGL version 4.3 is used in all HiCAD modules. Until now this was only the case with the module HiCAD Point Cloud. This means that HiCAD 2021 can only be run on computers whose graphics card supports OpenGL Version 4.3 or higher. To avoid possible problems with onboard graphics cards, we recommend using a stand-alone graphics card. Further information can be found in the HiCAD 2021 News.

New Mask Editor in HELiOS 2020
In HELiOS 2020, the previous mask format has been changed from .msk to .xml, parallel to the revision of the mask editor. In addition, mask files are now managed outside the installation directory, resulting in some changes in the system architecture that administrators should urgently consider. Before updating to HiCAD / HELiOS 2020 or 2021, please read the installation instructions carefully.

Discontinuation of the ISD.PDM.API
Before carrying out a HELiOS update for an older HiCAD version, please note that from HELiOS 2022 omwards, the previous ISD.PDM.API will be discontinued and replaced by the new API from Helios.Interface. If you use customisations that use functionalities from the previous ISD.PDM.API, you must update the customisations to the new API before carrying out the HELiOS update.