int sym_find_initial_bounds(sym_environment *env)
This routine invokes the user callback user_start_heurs() to set the priori bound for the problem.
| sym_environment *env | INOUT | Pointer to the SYMPHONY environment. | 
| ERROR__USER | Error. User error detected in user_start_heurs() | 
| function. | |
| FUNCTION_TERMINATED_ABNORMALLY | Function invoked unsuccessfully. | 
| FUNCTION_TERMINATED_NORMALLY | Function invoked successfully. |