In most cases, you can easily create new solution files based on a simulation in an older version of Ansys Chemkin, by upgrading your Chemkin project (version Chemkin 4.0 or later) or by using the Input-file Import item under File in the ribbon or menu (all versions prior to 4.0) and then re-running the problem in Chemkin. However, there may be cases when you would like to also compare results using a previously saved solution from a pre-4.0 version of Chemkin. The Upgrade Solution File utility allows such older solutions to be upgraded for this purpose.

Any solution files (for example, XMLdata.zip) created from an earlier version of Ansys Chemkin will need to be upgraded before they can be post-processed with the Chemkin Post-Processor. In particular, the Upgrade Solution File utility will replace the block of chemistry data from the old solution with a Chemkin-compatible chemistry block, to allow any derived calculations that may take place in the Post-Processor to proceed. For this reason, you will need to first identify or create a Chemistry Set using the chemistry input files that were used to create the old solution, before upgrading. When the Upgrade Solution File utility is launched, the panel will request this Chemistry Set file path.