It is a bit better/weirder than I thought.
My circuit with the added "+" character to extend the B-source line *did* in fact run.
The warning that is reported (by popping up the expanded listing) is that there are
current sources without parallel resistance (an unrelated issue). It is warning,
not an error, and I misread it.
On the place in the log listing where the B-source line should have been there
are three characters (maybe 1 more, I didn't fire up the hex editor) like this:
?…×?
This might be an intended place holder for an overly long line.
So, there is no compatibility problem, unless the three characters prevent reading the
*.log file correctly, or unless the B-source line needs to be edited in the GUI.
-marcel