0	Display no information
1	Display only severe errors
2	Display severe and serious errors (default)
3	Display warnings as well as severe and serious errors
4	Give a full report on variable usage as well as displaying errors and warnings

0	No errors or warnings
1	Warnings
2	Serious errors
3	Severe errors

Used as a value

Used as a table or list element

Used as a call-by-value parameter

Used as a call-by-name parameter (a quoted parameter)

Called as a function

Assigned a procedure

Assigned a list

Assigned a set

Assigned a range

Assigned a value as a table or list element

Assigned  a  function  value  (assigned  a value to remember as a function value)

	Severe errors - return code 3
0	"The following statements are not inside
	any loop:"
	Indicates that a break or next statement has
	appeared outside of a loop.
1	"The following statements are not inside
	any procedure:"
	Indicates that an error or return statement has
	appeared outside of a procedure.
2	"These names were declared more than
	once as a local variable:"
	Indicates that the same local variable has been
	declared more than once in a procedure's local
	statement.
3	"These names appeared more than once in
	the parameter list:"
	Indicates that the same parameter has been
	declared more than once in a procedure's parameter
	list.
4	"These names were declared as both a
	local variable and a parameter:"
	Indicates that a procedure has a parameter and
	local variable with the same name.
5	"Invalid left hand side of assignment:"
	Indicates that an invalid expression (e.g. a set,
	a sum, etc.) appears on the left hand side of an
	assignment.
	Serious errors - return code 2
6	"These names were used as the same loop
	variable for nested loops:"
	Indicates that an inner loop uses the same loop
	control variable as an outer loop.
7	"There is unreachable code that will
	never be executed:"
	Indicates that a statement occurs immediately
	after a break, next, return, or error statement.
	Such a statement can never be reached during the
	course of execution.
8	"These names were used as iteration
	control variables for both a $, sum, or
	product construct and a loop:"
	Indicates that a construct such as seq, add, or $
	uses the same control variable as an enclosing
	loop.
9	"These names were used as global names
	but were not declared:"
	Indicates that a procedure makes use of some
	global names, but has not declared them as such.
10	"Underscore names are reserved for use
	in the library. These global names start
	with _:"
	Indicates use of a global name beginning with the
	underscore ("_") character. Such names are
	reserved for use by Maple's supplied library.
11	"These local variables were never used:"
	Indicates that the local variables were declared,
	but never used within the procedure. Removing the
	declarations can marginally improve performance
	and reduce memory usage.
12	"These exported variables were never used:"
	Indicates that the module exports were declared,
	but never used within the module. Removing the
	declarations can marginally improve performance
	and reduce memory usage.
13	"These local variables were used but
	never assigned a value:"
	Indicates that a local variable's value was used,
	but that no value was ever assigned to it,
	suggesting a coding error.
14	"These local variables were assigned a
	value but otherwise not used:"
	Indicates that a value was assigned to a local
	variable, but that this variable was then never
	used, suggesting a coding error.
15	"These parameters were never used:"
	Indicates that the specified parameters of a
	procedure were never actually referred to by name
	within the procedure.