Is it possible for AppleCommander to give a return a code for a failed BASIC parse?

I call it with
result = os.system('java -jar ac.jar -bas ...etc...

If I give try to import something that isn't code, it shows:

Error: Expected a number in line #1
java.lang.RuntimeException: Expected a number in line #1
at io.github.applecommander.bastools.api.Parser.expectNumber(Parser.java:68)
at io.github.applecommander.bastools.api.Parser.readLine(Parser.java:34)
at io.github.applecommander.bastools.api.Parser.parse(Parser.java:28)
at com.webcodepro.applecommander.ui.ac.putAppleSoft(ac.java:198)
at com.webcodepro.applecommander.ui.ac.main(ac.java:175)
AppleCommander command line options [1.6.0]:
-i [] display information about image(s).
...etc...

BUT it doesn't return a result of 256 to my calling program, so my script doesn't know that it failed.

Is this fixable?

Thanks.
Kay