Error Message List - Radio Shack TRS-80 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.
• Correct the calculation formula
or data.
• Outside the input range of a numerical • Verify the data.
function.
• The result is indefinite or impossible.
4 Undefined line
number error
• No designated line number for a
GOTO statement or a GOSUB
statement.
• Correct the designated line
number.
• For a command or function that
requires an argument. the argument is
outside the input range.
Argument error 5
1--------1----------------- - - - - - -
- - - - - - - - - - - - f - - - - - - - - -
• Correct the argument-error.
• Do not use the same memory
for a numerical variable and a
character variable at the same
time.
-------- - - - - - - - 1 - - - - - - - - - - - - - - - - - - - - - 1
• Attempt was made to use a memory • Expand the memory properly.
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.
Variable error
6
1 - - - - - - - - + - - - - - - - - - - - + - - - - - - - - - - - - - - - - - -
- - - - f - - - - - - - - ----------~
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.
1 - - - - - - - + - - - - - - - - - - - + - - - - - - - - - - - - - - - - - 1 - - - - - - - - - - - - - - - - - - - 1
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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