VTech PreComputer Prestige Course Manual page 85

REDO
A string is assigned to a numeric variable during the execution of the INPUT command.
RETURN WITHOUT GOSUB
A RETURN statement is encountered for which there is no previous unmatched GOSUB
statement.
STRING FORMULA TOO COMPLEX
A string expression is too long or too complex. The expression should be broken into smaller
expressions.
STRING TOO LONG
An attempt is made to create a string more than 255 characters long.
SUBSCRIPT OUT OF RANGE
An array element is referenced either with a subscript that is outside the dimensions of
the array or with the wrong number of subscripts.
SYNTAX ERROR
A line is encountered that contains some incorrect sequence of characters(such as
unmatched parentheses, misspelled command or statement, incorrect punctuation, etc.)
TYPE MISMATCH
A string variable name is assigned a numeric value or vice versa; a function that expects
a numeric argument is given a string argument or vice versa.
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