Hey, Getting some very strange behaviour with a SS1.0 search script

filters[1] = new nlobjSearchFilter("trandate", null, "notbefore", '20/2/2020');

the above works fine, however if I use the following

filters[1] = new nlobjSearchFilter('trandate', null, 'on', 'today');

I get the following error Search error: Parentheses are unbalanced. this is the same regardless of if I manually code in todays date