Version 4.1.0 is backward compatible to version 4.0.0. This means, there is no need to convert user models, because no renaming or moving has been done on the library. Please note: simulation results might be affected by necessary changes and bug fixes that were applied since the 4.0.0 release, see below for more details.
Short overview:
- 17 new components (e.g. Blocks for recording of min and max of a signal)
- 12 improved components (e.g. tables can now read CSV)
- 18 potentially non-backwards-compatible changes (especially Constants.inf, Constants.small, Constants.eps)
- 26 bug fixes, which may cause the simulation results to change for the better
- 3 models marked as obsolete
This version is based on the recent Modelica language standard version 3.6.
About 560 issues (including 392 pull requests) have been addressed for this release.
Detailed release notes are available in Modelica.UsersGuide.ReleaseNotes.Version_4_1_0. You can also browse them within your Modelica tool.
Please note that you should not normally download and install the Modelica Standard Library yourself - tool vendors provide it bundled with their tools and with the appropriate tool-specific customizations, in particular the implementation of the ModelicaServices library, but also possibly the binaries of the external C functions.