Originally posted by: GokhanCeyhan

Hi,

I got the following error during the run of my branch and price algorithm.

During the run, the memory usage increases up to 90% after some time and this error occurs. I free the memory from unused arrays(IloRangeArray, IloNumArray...) but cannot think of any other reason. What might be the reason for this error? Thanks in advance...

std::bad_alloc is thrown when there is no more memory available. Is it expected that your program may run of of memory, maybe because the model or the search tree get very big? If it is expected then you should double check that you handle this exception correctly. If hitting the memory limit is not expected then you have a memory leak and need to track that down. A typical reason for a memory leak when using C++ Concert is to a forgotten call to end() for Ilo* objects.

Originally posted by: GokhanCeyhan

Thanks a lot Daniel.

It may be expected when the problem size is very large but I try to solve a relatively small problem. I use end() method for every Ilo* object but what about IloNumVarArray. (e.g. IloNumVarArray dec) Is it enough to call dec.end() or should I call end() for every element in the array like dec[i].end?

IloNumVarArray::end() will only release the array itself. It will not release the IloNumVar instances that were stored in that array. To release those instances as well use IloNumVarArray::endElements().