Rsync syntax error when run from bash script

Question

I have been working on a backup script that uses rsync to do an incremental backup.

I have tested the following rsync command manually, and it runs and completes a b

Answer 1

The approach suggested by @chepner didn't work on my Mac OS X (10.9.4), but eval did.

eval rsync "$OPT1 $SRC $TRG"