msos2.hlp (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
SYS1599
SYS1599
 
Explanation
 
The file to be appended cannot be opened for reading.
 
Action
 
Make sure the file exists and the filename is spelled correctly.