Error Message List - Radio Shack TRS-80 26-3650 Service Manual

7.
ERROR MESSAGE
LIST
Error
Code Meaning
Cause
Corrective
Measure
1
Memory
overflow or
system stack
overflow
• Program cannot be written
due
to
insufficient
number
of
steps
or
memory cannot be expanded.
• Stack overflow
due
to
a
complicated
calculation formula.
•
Clear
unnecessary programs or
reduce
the
number
of
memories.
• Divide
and simplify the numeri-
cal
expression.
2
Syntax
error
•
A
mistake has been
made
in
writing
the
program,
etc.
•
The
left
side
format
is
different
from
the
right
side
format
in
a substitution
statement, etc.
•
Correct the
error in
the input
program,
etc.
3
Mathematical
error
•
The
calculation result
of
a
numerical
expression
is
10
100
or greater.
• Outside
the input range of a
numerical
function.
•
The
result
is
indefinite
or impossible.
• Correct the calculation
formula
or
data.
• Verify the data.
4
Undefined
line
number
error
•
No
designated
line
number
for a
GOTO
statement or
a
GOSUB
statement.
• Correct the designated
line
number.
5
Argument
error
• For
a
command
or function that
requires
an argument, the
argument
is
outside the input range.
• Correct the
argument
error.
6
Variable
error
•
Attempt was made
to use
a
memory
which has
not been expanded.
•
Attempt was
made
to
use the
same
memory
for a
numerical variable
and
a
character variable at
the
same
time.
•
Expand the
memory
properly.
•
Do
not use the
same
memory
for
a
numerical variable
and
a
character variable at
the
same
time.
7
Nesting error
•
A RETURN
statement appears other
than during subroutine execution.
•
A NEXT
statement appears other than
during a
FOR
loop or the variable of
the
NEXT
statement
is
different
from
that of the
FOR
statement.
• Subroutine nesting
exceeds 8
levels.
•
FOR
loop
nesting
exceeds
4
levels.
•
Remove
the unnecessary
RETURN
statement or
NEXT
statement.
•
Reduce the subroutines or
FOR-NEXT
loops to within
the
maximum
levels.
9
Option
error
• Execution
is
performed
in
the
PRT
mode, or an option
command
such
as
SAVE
is
executed
when
no
printer
or
tape recorder
is
connected.
•
Connect
a printer
or tape
recorder.
Release the
PRT
mode.
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