ERRORS - source-solutions/HELP GitHub Wiki

NEXT without FOR
A NEXT statement was encountered for which no matching FOR could be found.

Syntax error
The BASIC syntax is incorrect. A statement or expression was mistyped or called in one of many incorrect ways. This error is also raised on a DATA line if a READ statement encounters a data entry of an incorrect format.

RETURN without GOSUB
A RETURN statement was encountered for which no GOSUB call was made.

Out of DATA
A READ statement is attempting to read more data entries than can be found from the current DATA location onward.

Illegal function call
A statement, function or operator was called with parameters outside the accepted range. This error is also raised for a large variety of other conditions - check the reference for the statement or function called.

Overflow
A numeric expression result or intermediate value is too large for the required number format.

Out of memory
There is not enough free BASIC memory to complete the operation. Too much memory is consumed by the program; variables, arrays and strings, or execution stacks for loops, subroutines or user-defined functions.

Undefined line number
A reference is made to a line number that does not exist in the program.

Subscript out of range
An array index (subscript) is used that is outside the range reserved for that array by the DIM statement.

Undefined variable
A simple variable was used without assigning it a value, or a control variable was used with NEXT first setting it up in a FOR statement, or a subscripted value was used before dimensioning the array with DIM.

Address out of range
The value specified in a CLEAR statement is either too big or too small.

Statement missing
A jump was attempted to a statement that no longer exists.

Type mismatch
The expression used is of a type that cannot be converted to the required type for the function or statement. Most commonly, this is raised if a string argument is supplied to a statement or function that expects a number, or the opposite.

Out of screen
CIRCLE, DRAW or PLOT were used with parameters beyond the screen size. Or INPUT has generated more than 23 lines in the lower part of the screen.

Bad I/O device
File handling report.

Undefined stream
Attempted to read or write from a stream that has not been defined with an OPEN statement.

Undefined channel
Attempted to open a stream to an unrecognized channel.

Undefined user function
The FN function is called with a function name for which no definition was made by a DEF FN statement.

Line buffer overflow
There is not enough memory space left to enter the new program line.

FOR without NEXT
A FOR statement was encountered for which no matching NEXT statement can be found.

WHILE without WEND
A WHILE statement was encountered for which no matching WEND statement can be found.

WEND without WHILE
A WEND statement was encountered for which no matching WHILE statement can be found.

File not found
A named file on a disk device cannot be found.

Input past end
An attempt is made to retrieve input from a file that has passed its end of file.

Path not found
An OPEN, MKDIR, RMDIR, or CHDIR statement is executed referring to a (parent) path that does not exist on the disk device.