Because the backslash (\) symbol is used as an escape character, entries that use single backslash symbols are not interpreted correctly. For example:
com.sybase.ase.ws.interfaces = d:\sybase\ini\sql.ini
Escape the backslash with another backslash:
com.sybase.ase.ws.interfaces = d:\\sybase\\ini\\sql.ini
You can also use forward slashes:
com.sybase.ase.ws.interfaces = d:/sybase/ini/sql.ini