Error messages of the S-BASIC 1Z-013B

Error messages

( of Sharp's BASIC interpreter 1Z-013B )

Error message format

There are two formats of error messages:

1. <message> ERROR

This type of error message will appear while the execution of an erroneous BASIC command directly typed in or if an error was detected during the execution of the edit mode.

2. <message> ERROR IN <line#>

This type of error will appear if an error was detected while running a BASIC program.

ERN and ERL

The error number is stored into the BASIC variable ERN by the BASIC interpreter. The BASIC line number in error is stored into the BASIC variable ERL by the BASIC interpreter. You can write your own error routines to prevent an abnormal end of your BASIC program by the BASIC command ON ERROR GOTO. Your own error routine should try to analyze the error and to restart the program correctly.

Examlpes of possible commands for error handling:

200 ON ERROR GOTO 1000
210 IF A=B THEN ERROR 44
|
|
1000 IF ERN=44 THEN PRINT "My own error message"
1010 IF ERN=44 THEN ERROR 1: REM any value from 0 to 255, error message while BASIC program abnormal ends will be "Syntax error"

Error messages

The following table contains all error messages and the associated error numbers.

Error number	Error message	Description
1	Syntax error	The syntax of the command is invalid
2	Overflow error	Overflow during arithmetic operation or a value exceeds the admitted range
3	Illegal data error	The constant or the variable used is invalid
5	String length error	Length of string exceeds 255 characters
6	Memory capacity error	The amount of memory is too small
7	Array def. error	An existing array was redefined to increase its size
8	Line length error	BASIC program line exceeds maximum length
10	GOSUB nesting error	Nesting of GOSUB definitions exceeds the memory capacity
11	FOR-NEXT error	Number of FOR-NEXT definitions exceeds the memory capacity
12	DEF FN nesting error	Nesting of DEF FN functions exceeds maximum
13	NEXT error	NEXT without FOR
14	RETURN error	RETURN without GOSUB
15	Undef. function error	Undefined function executed
16	Undef. line num. error	Undefined line was referenced
17	Can't continue	Unable to execute CONT command
18	Memory protection	Violation of BASIC's protected workarea by any write
19	Instruction error	Direct BASIC command and BASIC execution command mixed
20	Can't RESUME error	Unable to execute RESUME command
21	RESUME error	RESUME executed at a non-error condition
24	READ error	READ without DATA
43	Already open error	File already open
63	Out of file error	Further read after end of file
65	Printer is not ready	Printer not connected or not online
67	Out of paper	Plotter operation exceeds the plot range
68	Printer mode error	Command not supported for the active operation mode of the plotter ( change mode! )
70	Check sum error	Error while reading file from the data recorder