After building XEmacs (with libpng 1.0.1 on a RedHat 5.2 system) I run in some Problems while trying to open a file. When I click on the "Open" icon or use File->Open the Open-file-dialog flashes up and then disappears. In the status line I get the following message: "Symbol's funktion definition is void: xpm-button-create" Is it a Problem with my xpm-libs? (xpm-3.4j) Regards Martin -- In any formula, constants (especially those obtained from handbooks) are to be treated as variables.