diff -r 751a14b992f2 -r bfbdded3763a lemon/mip_cplex.cc
--- a/lemon/mip_cplex.cc	Fri Feb 16 15:57:48 2007 +0000
+++ b/lemon/mip_cplex.cc	Fri Feb 16 19:11:31 2007 +0000
@@ -58,7 +58,7 @@
     CPXchgctype (env, lp, 1, indices, ctype);
   }
   
-  MipCplex::ColTypes MipCplex::_colType(int i){
+  MipCplex::ColTypes MipCplex::_colType(int i) const {
     
     char ctype[1];
     status = CPXgetctype (env, lp, ctype, i, i);
@@ -85,7 +85,7 @@
   }
 
 
-  LpCplex::SolutionStatus MipCplex::_getMipStatus(){
+  LpCplex::SolutionStatus MipCplex::_getMipStatus() const {
 
     int stat = CPXgetstat(env, lp);
 
@@ -119,13 +119,13 @@
       
   }  
 
-  MipCplex::Value MipCplex::_getPrimal(int i){
+  MipCplex::Value MipCplex::_getPrimal(int i) const {
     Value x;
     CPXgetmipx(env, lp, &x, i, i);
     return x;
   }
   
-  MipCplex::Value MipCplex::_getPrimalValue(){
+  MipCplex::Value MipCplex::_getPrimalValue() const {
     Value objval;
     status = CPXgetmipobjval(env, lp, &objval);
     return objval;