Hello, I'm working on https://github.com/angerangel/rebolide and if you download the rebolide.r file, you'll find a brand-new IDE for Rebol with syntax color, resizable. On Linux I have few bugs, one on the font (I'm confident to resolve soon) and one on request-file. Usually request-file works well, but with rebolide.r something goes wrong. If you click on OPEN and click on a file in the file list of reques-file, you'll receive the following message: Code: ** Script Error: Cannot use subtract on block! value ** Where: pane ** Near: subface/offset: subface/old-offset: id - 1 Can you figure out what involve the bug? No one script used by rebolide.r redefine id.