Originally posted by: suji248

Hello 

Am getting this below error when solving CPLEX both LP and MIP in parallel.  Once I get this error even after making new CPLEX environment am getting same error again. 

System.AccessViolationException was unhandled
  HResult=-2147467261
  Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
  Source=ILOG.CPLEX
  StackTrace:
       at ILOG.CPLEX.CplexStubs.CPXmipopt(IntPtr env_, IntPtr lp_)
       at ILOG.CPLEX.CplexI.Solve()
       at ILOG.CPLEX.Cplex.Solve()
       ....................................................
       at System.Threading.Tasks.Task.Execute()
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
       at System.Threading.Tasks.Task.ExecuteEntry(Boolean bPreventDoubleExecution)
       at System.Threading.ThreadPoolWorkQueue.Dispatch()
  InnerException: 

What objects do you share between threads? Do you have a separate Cplex instance for each thread?