Hi,

I had this compressor system which I run on 2013 version. Our counterpart use 2011 version and cannot open the file. Is there any other way to convert this one to 2011 version? It's really inconvenient to re-model this one to 2011.

We clearly state in the documentation with every release, that models are NOT downward compatible. This is because of the additional data (typically) added in later versions of the software.

CAESAR II does not have the ability to save a model in an earlier format.