3Com 2200 manual Common Syntax, Errors

Common Syntax Errors A-13

Common Syntax	When a packet filter definition is loaded, the definition is checked for syntax
Errors	errors. The syntax errors and their causes are listed in Table A-1.
	Table A-1 Possible Syntax Errors When Loading Packet Filters
	Syntax Error			Description
	Opcode	not found		An opcode was expected on the line and was not found.
				The opcode must be one of those described in “Opcodes” on
				page A-1 and must include the size, if any. The opcode and
				size must be separated by a single “.” with no intervening
				spaces. Any mix of uppercase and lowercase characters is
				permitted.
	Unknown		opcode	An opcode was expected on the line and was not found.
				The opcode must be one of those described in “Opcodes” on
				page A-1 and must include the size, if any. The opcode and
				size must be separated by a single “.” with no intervening
				spaces. Any mix of upper and lower case characters is
				permitted.
	Operands		are not	The opcode requires two operands of the same size. The top
	the same		size	two operands currently on the stack are of different sizes.
	Stack	underflow		The opcode requires one or more operands. An insufficient
				number of operands are currently on the stack.
	Stack	overflow		The opcode pushes an operand on the stack. The stack does
				not have sufficient room for the operand.

No result found on top of stack

The program must end with a byte operand on the top of the stack. After the last instruction in the program is executed, the stack is either empty or contains an operand other than a byte.

Extra characters			The source line contains extraneous characters that are not
on line			part of the instruction and are not preceded by a comment
			character (#).
Expected a		byte	The opcode requires a byte operand as one of its parameters.
operand			The operand is of a size other than a byte.
Offset	not	found	The opcode requires an offset to be specified. None was
			found on the line.
Literal	not	found	The opcode requires a literal value to be specified. None was
			found on the line.
String	not	found	The opcode requires a quoted string to be specified. None
			was found on the line.

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