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- First non-comment line of program must declare program name, like this: Program <programName>.
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- First line of procedure must declare name of procedure, like this: on <procedureName>.
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- Identifier exceeds maximum length (19 characters).
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- Too many variables (maximum = 20 per procedure).
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- An identifier must begin with an alphabetic character.
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- Too many procedures (maximum =
- 16 per program).
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- Too many procedure parameters (maximum = 9).
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- Procedure parameters must be separated by commas.
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- Unmatched “end if”.
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- Unmatched “end repeat”.
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- Unmatched end procedure command.
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- Unmatched “if” or “else” — need an “end if”.
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- Unmatched “else”.
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- The set position command takes two parameters, separated by a comma.
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- The put command takes the form, “put <something> into <variable>”, or “put [the] position into <variable,variable>”.
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- The “put [the] position into” command takes 2 parameters separated by a comma (e.g., “... into x,y”).
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- Misplaced “not” in if-statement (must immediately follow: “if not...etc.”).
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- Expected “then” in if-statement (“if...then...etc.”).
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- Expected “=” in repeat-with statement (“repeat with <var> = <something> [down]to <something>”).
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- Expected “to” or “downto” in repeat-with statement (“repeat with <var> = <something> [down]to <something>”).
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- Illegal decimal (“.”): can only be used in real-type constant with preceding integer, e.g.: “33.3”, “0.5”.
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- Missing End procedure statement: cannot begin new procedure before finishing old one.
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- Wrong number of parameters for this procedure.
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- Cannot use “exit repeat” or “next repeat” outside of repeat loop.
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- Expected “right” or “left” after “turn”.
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- Expected “heading” or “position” after “set”.
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- Expected “repeat” after “next”.
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- Expected “up” or “down” after “pen”.
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- Expected “screen” after “clear”.
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- The penSize command takes 2 parameters, separated by a comma.
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- Illegal penMode parameter.
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- The wrap command takes 1 parameter, either “on” or “off”.
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- Too many commands (maximum = 100 per procedure).
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- Attempt to allocate memory failed. Big trouble. Suggest save and exit.
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- Unable to interpret this line.
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- QuickTurtle error.
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- Missing parameter.
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