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RPBASIC-52 PROGRAMMING GUIDE

C-1

APPENDIX C- ERROR MESSAGES

The RPB ASIC-52 error processor helps identify errors.

When running a program , error messages are expressed as:

ERROR: XXX - IN LINE NNN

NNN Instruction

_______X

where XXX is the type of error and NNN is the program line number where the error occurred. The "______X"

identifies the very approximate location of the error. For example, a BAD ARGUMENT error occurring at line

100 is expressed as:

ERROR: BAD ARGUMENT - IN LINE 100

100 DBY(257)=5

_____________________X

In Command mode, only the error type is printed since there are no line numbers in Command mode.

RPBASIC-52 errors include:

A-STACK

ARITH. UNDERFLOW

ARITH. OVERFLOW

ARRAY SIZE

BAD ARGUMENT

BAD SYNTAX

C-STACK

CAN'T CONTINUE

DIVIDE BY ZERO

I-STACK

MEMORY ALLOCATION

NO DATA

HARDWARE

A-STACK

The argum ent stack pointer is out of bounds. Too m any expressions were pushed or tried to pop non -existent data

off the stack.

ARITH. UNDERFLOW

The re sult of a n arithm etic operation is beyond the lowe r limit o f RPB ASIC -52 floa ting-point num bers.

RPBASIC-52's smallest floating-point number is ±1E-127. An operation such as 1E-100/1E28 would cause an

ARITH. UNDERFLOW error.

This exam ple produces a correct result:

>?1e-100/le26

1.0 E-126

1 2 ... 153 154 155 156 157 158 159 160 161 162 163

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