Macro Variable _ORLP_
The LP procedure defines a macro variable named _ORLP_.
This variable contains a character string
that indicates the status of the procedure.
It is set whenever the user gets control, at break points,
and at procedure termination.
The form of the _ORLP_ character string is
STATUS= PHASE= OBJECTIVE= P_FEAS= D_FEAS= INT_ITER= INT_FEAS=
ACTIVE= INT_BEST= PHASE1_ITER= PHASE2_ITER= PHASE3_ITER=.
The terms are interpreted as follows:
- STATUS=
- the status of the current solution
- PHASE=
- the phase the procedure is in (1, 2, or 3)
- OBJECTIVE=
- the current objective value
- P_FEAS=
- whether the current solution is primal feasible
- D_FEAS=
- whether the current solution is dual feasible
- INT_ITER=
- the number of integer iterations performed
- INT_FEAS=
- the number of integer feasible solutions found
- ACTIVE=
- the number of active nodes in the current branch and
bound tree
- INT_BEST=
- the best integer objective value found
- PHASE1_ITER=
- the number of iterations performed in phase 1
- PHASE2_ITER=
- the number of iterations performed in phase 2
- PHASE3_ITER=
- the number of iterations performed in phase 3
Table 3.5
shows the possible values for the nonnumeric
terms in the string.
Table 3.5: Possible Values for Nonnumeric Terms
STATUS
|
P_FEASIBLE
|
D_FEASIBLE
|
SUCCESSFUL | YES | YES |
UNBOUNDED | NO | NO |
INFEASIBLE | | |
MAX_TIME | | |
MAX_ITER | | |
PIVOT | | |
BREAK | | |
INT_FEASIBLE | | |
INT_INFEASIBLE | | |
INT_MAX_ITER | | |
PAUSE | | |
FEASIBLEPAUSE | | |
IPAUSE | | |
PROXIMITYPAUSE | | |
ACTIVE | | |
RELAXED | | |
FATHOMED | | |
IPIVOT | | |
UNSTABLE | | |
SINGULAR | | |
MEMORY_ERROR | | |
IO_ERROR | | |
SYNTAX_ERROR | | |
SEMANTIC_ERROR | | |
BADDATA_ERROR | | |
UNKNOWN_ERROR | | |
This information can be used when PROC LP is one step in a larger
program that needs to identify how the LP procedure terminated.
Because _ORLP_
is a standard SAS macro variable, it can be used in the ways
that all macro variables can be used (see the
SAS Guide to Macro Processing).
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.