macro embeded in string

[Alex_SYB]

I would like to do something like

vfs.file.cksum["/apps/abc/qfix/etc/configfile_{$QUICKFIX_ENV}.cfg"]

I have $QUICKFIX_ENV defined for the host. to prod
it worked when I had it manualled defined
vfs.file.cksum["/apps/abc/qfix/etc/configfile_prod.cfg"]

if not can I concatinate strings
vfs.file.cksum["/apps/abc/qfix/etc/configfile_"+{$QUICKFIX_ENV}+".cfg"]

[BDiE8VNy]

Your first approach should work.

Double-check that the User macro is really set correctly (e.g. is set to 'prod' without quotes).
Do you already have inspect the log files for errors concerning this item?