Bronze Edition Guide - True BASIC

D. Explanations of Error Messages 187
Can’t use this statement here.
You’ve used part of a True BASIC structure, but in the wrong place. For instance, you might
have placed a CASE part outside of any SELECT CASE statement, or ELSE IF statement
outside of any IF-THEN statement. True BASIC also prints this message if you add an extraneous
statement between the SELECT CASE line and its first CASE part. Refer to the
proper chapters of this guide to see how the structured statements are formed.
Channel is already open. (7003)
You've tried to open a file or window using a channel number currently in use.
Channel isn't a window. (-11005)
You've used a window instruction with a channel number that refers to a file.
Channel isn't open. (7004)
You've tried to use a channel number (for a file or window) without using the OPEN statement.
Channel number must be 1 to 1000. (7001)
All channel numbers must be in the range 1 to 1000, except for #0, which refers to the output
window.
Constant too large: constant in routine.
The numeric constant displayed is too large for your computer to handle. Type PRINT
MAXNUM to see the largest possible number on your computer, and then change your program
to use a smaller number.
Data item isn't a number. (8101)
You've used a numeric variable in a READ statement but the matching DATA item is not
a number.
DET needs a square matrix. (6002)
The DET function can only be used on a square matrix, since the determinant is mathematically
defined only for such matrices.
Disk full. (9006)
You are writing output to a file, and the disk has become full.
Diskette removed, or wrong diskette. (9005)
You had opened a file, but, while True BASIC was using it, you removed the diskette and
inserted another one. Don’t switch diskettes while they’re in use!