Citect 2018 and Citect 2018 R2 Interchangeable?

Hi Greg ,
Unfortunately it is not possible to go backwards. You will struggle to get the project to compile. Graphics are definitely not backwards compatible. You could in theory export tags (Var, Trend Alarm, etc.) and import them back in from 2018R2 to 2018 without any issues. The main challenge is that new features are added to new versions. The development team focus on supporting upgrade paths.
My advice is to develop on the lowest version you think you could possibly use in production. You can simply upgrade to higher versions as required, but do all your main development in the lower version.

Hi Greg ,
Unfortunately it is not possible to go backwards. You will struggle to get the project to compile. Graphics are definitely not backwards compatible. You could in theory export tags (Var, Trend Alarm, etc.) and import them back in from 2018R2 to 2018 without any issues. The main challenge is that new features are added to new versions. The development team focus on supporting upgrade paths.
My advice is to develop on the lowest version you think you could possibly use in production. You can simply upgrade to higher versions as required, but do all your main development in the lower version.