Commodore Plus 4 - Page 407

Appendix A
Error Messages
BASIC 3.5 Error Messages
This appendix explains the BASIC 3.5 error messages in numerical order. When
you are using BASIC and get an error, you can display the number of the error by
PRINTing ER. ER is the system reserved, variable that contains the number of
the current error. PRINT ERR$(ER) to display the brief error message for the
current error. The only purpose for the error number is to identify the error with
the ER and ERRS functions, which are especially useful in error-trapping rou
tines. See the TRAP command for additional information.
1 TOO MAMT FILES
BASIC allows only 10 open files at a time. This message appears after you
attempt to OPEN an 1 lth file. To remedy, CLOSE an opened file and then reissue
the OPEN command that was rejected for being the 1 lth file.
2 FILE OPEN
This message actually tells you that you have illegally used a duplicate logical file
number in an OPEN command. BASIC does not permit duplicate logical file
numbers, even if you are opening different types of devices. As long as a file
remains open, you cannot reuse its logical file number in another OPEN
command.
3 FILE HOT OPEN
This message tells you that you have issued a file command without first issuing
an OPEN command. BASIC does not permit commands sent to a file or device
until after that file or device has been accessed by an OPEN command.
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