We get a syntax error message 'Command "" not known' for a script that we have copied from an HTML page. What does this message mean?

Probably the script line starts with a x'A0' character, which is the internal representation of a non-breakable space character in HTML ( ), instead of space character x'20'. This can happen when you copy a script from the HTML display of the browser to GuiXT script editor. GuiXT thinks that 'A0' is a non-space character, i.e. a command.

To fix this problem it is enough to copy the whole text into notepad editor and then back to script editor.