🚀 go-pugleaf

We're using a combination of FrameMaker 5.5.3 and 5.5.6 (and working on an upgrade to FrameMaker 7). On occasion, we need to open documents authored in 5.5.6 in 5.5.3 or vice versa and get font metric inconsistencies:

Document named is formatted with different font metrics (for example, different character widths or kerning). To reformat the document using available font metrics, click OK.

We have scripts to manage the data and use fmbatch fairly extensively. Unfortunately, there is no way to "click OK" in fmbatch, so the scripts stop.

Does anyone know of a way to cause the Open command in fmbatch to default to a "click OK" mode when doing file opens?
I've tried the -noerrorquit qualifier to fmbatch itself, but this appears to have to impact on the Open error messages. Any help would be appreciated.