The CLP procedure defines a macro variable named _ORCLP_. This variable contains a character string that indicates the status of the procedure. It is set at procedure termination.

If the CLP procedure terminates successfully, the _ORCLP_ character string has one of the following formats:

• STATUS=SUCCESSFUL SOLUTION=INFEASIBLE
  PROC CLP successfully detected that the problem is infeasible.

• STATUS=SUCCESSFUL SOLUTIONS_FOUND=n
  PROC CLP found n solutions, where n can be zero.

• STATUS=SUCCESSFUL SOLUTION=TIMEOUT SOLUTIONS_FOUND=n
  PROC CLP successfully terminated due to the MAXTIME= parameter and found n solutions, where n can be zero.

If the CLP procedure terminates unsuccessfully, the form of the _ORCLP_ character string is STATUS=ERROR_EXIT REASON=message, where message can be one of the following:

• BADDATA_ERROR

• MEMORY_ERROR

• IO_ERROR

• SEMANTIC_ERROR

• SYNTAX_ERROR

• CLP_BUG

• UNKNOWN_ERROR

This information can be used when PROC CLP is one step in a larger program that needs to determine whether the procedure terminates successfully or not. Because _ORCLP_ is a standard SAS macro variable, it can be used in the ways that all macro variables can be used.