warning and error when using HIGHS solver (ortools 9.10) #4590

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1. Mizux

   self-assigned this

   on Mar 13, 2025
2. Mizux

   added

   Help NeededModeling/Usage problemModeling/Usage problem

   Lang: C++Native implementation issueNative implementation issue

   Solver: Linear SolverRelated to all Linear Solver (GLOP, BOP, CBC etc...)Related to all Linear Solver (GLOP, BOP, CBC etc...)

   on Mar 13, 2025
3. Mizux

   added this to the v9.13 milestone on Mar 13, 2025
4. Mizux commented on Mar 13, 2025

   

   Mizux

   on Mar 13, 2025

   Last edited by Mizux

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   Which binary and command did you run ?

   WARNING: All log messages before absl::InitializeLog() is called are written to STDERR

   This is a know issue, our examples miss an init log call, on my way to fix this...

   #include "absl/base/log_severity.h"
   #include "absl/log/globals.h"
   #include "absl/log/initialize.h"
   ...
   
   int main(int argc, char** argv) {
     absl::InitializeLog();
     absl::ParseCommandLine(argc, argv);
     absl::EnableLogPrefix(false);
     absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
     ....

   or

   #include "absl/base/log_severity.h"
   #include "absl/log/globals.h"
   #include "ortools/base/init_google.h"
   
   int main(int argc, char** argv) {
   InitGoogle(argv[0], &argc, &argv, true); // InitializeLog, SetUsage, ParseCommandLine
   absl::EnableLogPrefix(false);
   absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
5. bzk226 commented on Mar 13, 2025

   

   bzk226

   on Mar 13, 2025

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   Thanks. I called HIGHS using pywraplp and tried to solve a mip problem. Could you help me to init log call with python lang? And should I use pywraplp or mathopt to call HIGHS or other solvers?

   This is a know issue, our examples miss an init log call, on my way to fix this...

   #include "absl/base/log_severity.h"
   #include "absl/log/globals.h"
   #include "absl/log/initialize.h"
   ...

   int main(int argc, char** argv) {
   absl::InitializeLog();
   absl::EnableLogPrefix(false);
   absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   absl::ParseCommandLine(argc, argv);
   ....
   or

   #include "absl/base/log_severity.h"
   #include "absl/log/globals.h"
   #include "ortools/base/init_google.h"

   int main(int argc, char** argv) {
   absl::EnableLogPrefix(false);
   absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   InitGoogle(argv[0], &argc, &argv, true);
6. lperron commented on Mar 13, 2025

   

   lperron

   on Mar 13, 2025

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   can you first try with 9.12 ?
7. bzk226 commented on Mar 14, 2025

   

   bzk226

   on Mar 14, 2025

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   can you first try with 9.12 ?

   After I upgraded the version to 9.12, the following error occurred in the program. Why did this happen?

   Process finished with exit code 139 (interrupted by signal 11:SIGSEGV)
8. lperron commented on Mar 14, 2025

   

   lperron

   on Mar 14, 2025

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   without a way to reproduce the model, we cannot do anything
9. Mizux commented on May 16, 2025

   

   Mizux

   on May 16, 2025

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   For python you should use something like this:

   from ortools.init.python import init
   
    init.CppBridge.init_logging("your_program.py")

   ref: https://github.com/google/or-tools/blob/main/ortools/init/python/init_test.py
10. Mizux

    added 2 commits that reference this issue on May 16, 2025

    rework ortools samples (#4590)

    88c57dd

    rework ortools/routing samples (#4590)

    aac608e
11. Mizux

    closed this as completedon May 16, 2025
12. Mizux

    added a commit that references this issue on May 16, 2025

    rework ortools samples (#4590)

    fdfc6af