Calling an older version of expression rule or interface ?

@ovidiub
AFAIK always an expression rule will take the latest version.
Coz one expression rule or interface can have more than 50 old version
So in your case it is practically difficult as let say u have 70 version if u change anything to existing rule ur version will become 71

So referencing to any particular old version of exp rule or interface is not possible. In that case you can create new rule of the old version and call it

That would be consider as an best reliable practice

@mohammedz Thanks !

Try to make passing arguments by keyword as a hard best practice. Then modifying the interface of an expression will not break when called by older code. See docs.appian.com/.../Expressions.html.

@stefanh791 Thank you ! That is a good practice indeed.

To add on -- if you rename/add/remove rule inputs from your expression rule/interface, you should make this update in the process model as well if needed since AFAIK, this is not done automatically.

@stefanh791 Agreed - but whilst it may not break, it might behave unpredictably depending on how it's written! :)

Passing arguments by keyword is the best practice and its good for error handling