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Exit Codes
Fast Downward returns the following positive exit codes, listing the names as used in src/search/utils/system.h and driver/returncodes.py. If it gets killed by a specific signal, it returns the signal as exit code, except for SIGXCPU which we intercept. The exit codes we defined are grouped in four blocks.
The first block (0-9) represents successful termination of a component which does not prevent the execution of further components.
Code |
Name |
Meaning |
0 |
SUCCESS |
All run components successfully terminated (translator: completed, search: found a plan, validate: validated a plan) |
1 |
SEARCH_PLAN_FOUND_AND_OUT_OF_MEMORY |
Only returned by portfolios: at least one plan was found and another component ran out of memory. |
2 |
SEARCH_PLAN_FOUND_AND_OUT_OF_TIME |
Only returned by portfolios: at least one plan was found and another component ran out of time. |
3 |
SEARCH_PLAN_FOUND_AND_OUT_OF_MEMORY_AND_TIME |
Only returned by portfolios: at least one plan was found, another component ran out of memory, and yet another one ran out of time. |
The second block (10-19) represents unsuccessful, but error-free termination which prevents the execution further components
10 |
TRANSLATE_UNSOLVABLE |
Translator proved task to be unsolvable. Currently not used |
11 |
SEARCH_UNSOLVABLE |
Task is provably unsolvable with current bound. Currently only used by hillclimbing search. See also issue377. |
12 |
SEARCH_UNSOLVED_INCOMPLETE |
Search ended without finding a solution. |
The third block (20-29) represents expected failures which prevents the execution further components
20 |
TRANSLATE_OUT_OF_MEMORY |
Memory exhausted. |
21 |
TRANSLATE_OUT_OF_TIME |
Time exhausted. Not supported on Windows because we use SIGXCPU to kill the planner. |
22 |
SEARCH_OUT_OF_MEMORY |
Memory exhausted. |
23 |
SEARCH_OUT_OF_TIME |
Timeout occurred. Not supported on Windows because we use SIGXCPU to kill the planner. |
24 |
SEARCH_OUT_OF_MEMORY_AND_TIME |
Only returned by portfolios: one component ran out of memory and another one out of time. |
The fourth block (30-39) represents unrecoverable failures which prevents the execution further components
30 |
TRANSLATE_CRITICAL_ERROR |
Critical error: something went wrong (e.g. translator bug, but also malformed PDDL input) |
31 |
TRANSLATE_INPUT_ERROR |
Usage error: wrong command line options |
32 |
SEARCH_CRITICAL_ERROR |
Something went wrong that should not have gone wrong (e.g. planner bug). |
33 |
SEARCH_INPUT_ERROR |
Wrong command line options or SAS+ file. |
34 |
SEARCH_UNSUPPORTED |
Requested unsupported feature. |