The SYNTAX ERROR refers to PRINT #15 which should be PRINT# 15 or more properly (and cost effective in RAM terms) PRINT#15 with no spaces between the PRINT and #. PRINT (for printing on screen) and PRINT# (for printing to files other than the default text console) are different BASIC tokens, therefore if you type PRINT #filenumber, the # will appear as an unexpected character to the BASIC parser and give you an error. Typing PRINT# filenumber instead, will use the file #filenumber to perform the output operation (in your case, send the disk command for head positioning). Hope that helps, M