CAPE-OPEN

I entered all NRTL parameter for the certain equation and saved it.
Whenever, I load the saved file, it asked me to switch to A+DT. I have no idea what to do.
Am I supposed to enter all NRTL parameters every time? I just want to use it as saved.

Also, when I updated the name of components in ChemSep, I expected the default component name in COCO would be changed. But nothing changed. why?

The component names in COCO are determined the first time a property package is loaded. After that the component stay the same if you change the definitions (but not the components, which are identified by CAS). You can change the component names in the Compounds tab, from Flowsheet settings.

You could also remove the Property Package and re-add it. This will remove all components (and all feed conditions that are stored for the components, etc) and then re-add the package. Now the components are added new, with their new names.