Cbc

Messages

Messages and codes passed by CBC are listed in the tables below. For a complete list, see Cbc/src/CbcMessages.cpp. The notation used is the same as for the printf in the C programming language.

• %s is a string
• %d is an integer
• %g or %f is a floating point value

There are several log levels. Setting the log level to be i produces the log messages for level i and all levels less than i.

• Logging Level 0: Switches off all CBC messages, but one.
• Logging Level 1: The default.
• Logging Level 2: Substantial amount of information, e.g., message 15 is generated once per node. Can be useful when the evaluation at each node is slow.
• Logging Level 3: Tremendous amount of information, e.g., multiple messages per node.

CBC Messages Passed At Logging Level 0:

Code		Text and notes
3007		No integer variables - nothing to do

CBC Messages Passed At or Above Logging Level 1:

Code		Text and notes
1		Search completed - best objective %g, took %d iterations and %d nodes
3		Exiting on maximum nodes
4		Integer solution of %g found after %d iterations and %d nodes
5		Partial search - best objective %g (best possible %g), took %d iterations and %d nodes
6		The LP relaxation is infeasible or too expensive
9		Objective coefficients multiple of %g
10		After %d nodes, %d on tree, %g best solution, best possible %g
11		Exiting as integer gap of %g less than %g or %g%%
12		Integer solution of %g found by heuristic after %d iterations and %d nodes
13		At root node, %d cuts changed objective from %g to %g in %d passes
14		Cut generator %d (%s) - %d row cuts (%d active), %d column cuts %? in %g seconds - new frequency is %d
16		Integer solution of %g found by strong branching after %d iterations and %d nodes
17		%d solved, %d variables fixed, %d tightened
18		After tightenVubs, %d variables fixed, %d tightened
19		Exiting on maximum solutions
20		Exiting on maximum time
23		Cutoff set to %g - equivalent to best solution of %g
24		Integer solution of %g found by subtree after %d iterations and %d nodes
26		Setting priorities for objects %d to %d inclusive (out of %d)
3008		Strong branching is fixing too many variables, too expensively!

CBC Messages Passed At or Above Logging Level 2:

Code		Text and notes
15		Node %d Obj %g Unsat %d depth %d
21		On closer inspection node is infeasible
22		On closer inspection objective value of %g above cutoff of %g
23		Allowing solution, even though largest row infeasibility is %g

CBC Messages Passed At or Above Logging Level 3:

Code		Text and notes
7		Strong branching on %d (%d), down %g (%d) up %g (%d) value %g
25		%d cleanup iterations before strong branching

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