I am not sure, whether this bug is already solved (I use Knime 3.5.3), but I have not found this topic in the forum.
I have several Column names with “$” in the name. There is a bug, if you use this columns in nodes like „Math Formula“ and „Rule-based Row Splitter“. The same columns works, if I rename the columns without using “$”
Best Regards
Kai-Uwe