Dear all,
I have to convert caesar files from 5.1 version to 5.3;
I have to convert more or less one hundred files. Is there a way to convert automatically the files, in order to avoid to open one single file and save it in 5.3 version and so on..?
Thank you

The answer to your question is "no".

However, why do you need to do this? CAESAR II input is upward compatible, so if someone running v.5.30 needed a file, they can just open it up.

Hi Richard, thank you for your response.
I want to do this because my client want only 5.3 Caesar version and I have the files in 5.1 version.

Your client will have to open the files in v.5.3 and resave them. If they want output in v.5.3, they will have to rerun the jobs. Note, there are changes in the Codes between v.5.1 and v.5.3, so there could be some changes to the results.