Darn, never mind. Discovered the " />" at end of <options from_data_table="bccdc_blast_fields" /> was of course causing all the <filters> that followed to be ignored. Thanks to those who may have chipped in on this one. (I get digest mode). d. ---------------------------------------- From: &quot;damion(a)learningpoint.ca&quot; <damion(a)learningpoint.ca&gt; Sent: 30 October 2013 14:24 To: galaxy-user(a)lists.bx.psu.edu Subject: Tool XML form building bug with <options from_data_table="..."> ? Has anyone run into this? I'm building a general-purpose filter control on my galaxy tool xml template for enabling numeric fields to be filtered by > < etc. parameters - in a user friendly way. I have a select list <para> driven by a data table: ... <param name="filter_column" type="select" label="Col"> <options from_data_table="bccdc_blast_fields" /> </param>...