Warning Global Constraint

Type

Selection

Range

The settings listed below

Default

Common_warning_default

For each global constraint it is verified whether or not it is binding. Consider the following examples:

CONSTRAINT:

identifier : ad

definition : cp::AllDifferent(i,v(i))

When the set that is the scope of index i is empty, AIMMS will issue the following warning “The cp::AllDifferent constraint does not need to restrict the value of any variable which makes it nonbinding.”.

In the following constraint, the number of occurrences in a subsequence is always between 0 and the sequence length.

CONSTRAINT:

identifier : seq

definition : cp::Sequence(

inspectedBinding : k,

inspectedValues : v3(k),

lookupValues : lv,

sequenceLength : 3,

lowerBound : 0,

upperBound : 3,

cyclic : 0)

For the above constraint AIMMS will issue the warning: “cp::Sequence(): With a zero lowerbound and a sequence length 3 and upper bound 3 this constraint becomes nonbinding.”

The option “Warning_Global_Constraint ” determines how nonbinding global constraints are reported, depending on the following settings:

  • Off

Do not issue a warning.

  • Warning_collect

Issue a warning and post it to the global error and warning collector.

  • Common_warning_default

Take action depending on the option ‘Common warning default’.

  • Warning_handle

Issue a warning and post it to the nearest error handler.

  • Strict_warning_default

Take action depending on the option ‘Strict warning default’.

  • Error

Issue an error.

  • Error_in_develop_else_warning

In a developer system same as Error, in a deployment system same as Warning_handle

  • Error_in_develop_else_off

In a developer system same as Error, in a deployment system same as Off

  • Warning_in_develop_else_off

In a developer system same as Warning_handle, in a deployment system same as Off

Note

  • With the option Maximal Number of Warnings Reported you can set the maximal number of warnings that are shown in errors/warnings and message window.

Learn more about