Free 64-bit versions
Introduced in 2023 as initially 32-bit, the freely available 32-bit versions of cpo2ds and cpo3ds have some limitations. These versions have now been upgraded to 64-bit and the 32-bit versions discontinued as of 2025.
The maximum numbers of segments for these free versions are 1500 and 3000 for cpo2ds and cpo3ds respectively and the following options are not available: scattering, stochastic, user cathodes, dielectrics, field import.
The full 15-day 64-bit evaluation version is still available and the 'perpetual' 64-bit software can still be purchased.