Troubleshooting¶

This section addresses common issues encountered when using the CVRP solver and provides solutions.

Memory Allocation Error¶

Issue:

When running the CVRP solver test instance (e.g., P-n20-k2.vrp), a fatal memory allocation error occurs, despite successful compilation:

[FATAL ERROR] Label assigned=8000000 failed in reallocateLabel. Not enough memory.

Cause:

The default setting for LABEL_ASSIGN (8,000,000) is designed for systems with large memory (e.g., 128 GB RAM). On systems with lower memory, this value leads to allocation errors.

Solution:

Reduce the LABEL_ASSIGN parameter to match your system’s available RAM:

1. Open the file:

   packages/application/cvrp/src/pricing/include/pricing_macro.hpp
   

2. Modify LABEL_ASSIGN:

   constexpr int LABEL_ASSIGN = 800000; // Example value; adjust according to your RAM capacity
   

3. Rebuild the solver:

   cd packages/application/cvrp
   sh build.sh
   

This adjustment should resolve the issue, allowing the solver to run successfully.