From a make file associated with an old Siemens C165 project, I have turned up the line... c:\c166v2\bin\sp166ke main.abs But can find no reference to sp166ke in the current manuals or on the Keil Search the Knowledge Databases Facility. The only hint I have been able to glean is from the site... http://www.hitex.co.uk/uvision/uvision2.pdf On page 3 of this document, it refers to... SP166KE.EXE as a 'symbol processor', but I can't find the file at all on my Keil CD. I'm assuming that this file is now redundant, but can someone please fill me in as to what this program did, and what the replacement for it is (if any). Yours (gratefully - in advance), Richard Roebuck.