CFA no longer worker as before

I’ve been using CFA to extract some variables from .pp files which was working fine up until a couple of days ago.
One of the commands is now producing netcdf files with a single value everywhere. This previously had worked correctly; when I run the same script on the same set of .pp files now it just fills the file with what I assume is the missing data value.
Has something changed recently? (Versions etc?).

Command I use (run in a batch file) is
cfa -i -o Control_O3_34_AllYears_CFA.nc --equal_all -s stash_code=34001 *.pp

I did do a test with a single .pp file in the selection, and that in fact worked, so I can find a work-around for processing all the .pp files.

I think the issue may be with the job not completing in the time given (although it had run within its time before). Will close the issue.