Modelica® components have been updated to use the Modelica Standard Library 3.2.1. Models saved in MapleSim 2015 will not be compatible with previous versions of MapleSim.
When a model created with a previous version of MapleSim is opened in MapleSim 2015, you will be prompted to create a backup file of the model before the model opens. Create the backup file if you want to use the model with your previous version of MapleSim.
For details on updating and backing up models from previous MapleSim releases, see Updating Models Created in a Previous Release of MapleSim.