# Inference Engine gives unclear error **URL:** \ **Category:** Support\ **Created:** [April 8, 2022, 12:50pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668 "2022-04-08T12:50:59Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Smlapenna](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/smlapenna/32/1029_2.png) [@Smlapenna](https://community.stardog.com/u/Smlapenna)\ **Post date:** [April 8, 2022, 12:50pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/1 "2022-04-08T12:50:59Z")
Good day, On page: [Inference Engine | Stardog Documentation Latest](https://docs.stardog.com/inference-engine/#explaining-reasoning-results) is the section: Explanations can be retrieved using the CLI [reasoning explain](https://docs.stardog.com/stardog-cli-reference/reasoning/reasoning-explain) command by providing an input file that contains the inferences to be explained: **$** stardog reasoning explain myDB inference\_to\_explain.ttl > > I assumed inference\_to\_explain.ttl is structured to contain triples. I tried creating a file **inf.ttl** that contains one row: `:BreachTrd a .` `:BreachTrd` is an instance I loaded into stardog database ts Breach is an OWL defined class I loaded into stardog database ts When I run reasoning like this: `stardog reasoning explain ts inf.ttl` I get this response: `Unexpected end of file [L7]` My inf.ttl only has one line – how can stardog be complaining about Line 7 Does anyone have suggestions or tips on how to structure the turtle file to be processed by the inference engine? The documentation does not give an example. ---
**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\ **Post date:** [April 8, 2022, 1:10pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/2 "2022-04-08T13:10:07Z")
Can you try it with the `-f` flag? `stardog reasoning explain -f NTRIPLES myDB inference.ttl` and might as well try turtle too although it shouldn't make any difference. `stardog reasoning explain -f TURTLE myDB inference.ttl` and can you check the logs to see if there's anything interesting. ---
**Author:** ![evren](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/evren/32/1515_2.png) [@evren](https://community.stardog.com/u/evren)\ **Post date:** [April 8, 2022, 1:52pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/3 "2022-04-08T13:52:10Z")
The error message is confusing and misleading in this case but I believe the problem is CLI command cannot find the file. Let me explain. As shown in the [examples](https://docs.stardog.com/stardog-cli-reference/reasoning/reasoning-explain#examples) you can explain an inferred triple by simply passing the triple as an argument to the command: ```auto stardog reasoning explain myDb "ex:JohnDoe a ont:Person" ``` Note that, the command is being helpful and does not require you to have `.` at the end or declare prefixes which are done automatically. That is why you'd see and error about line 7 because prefixes have been prepended. But all this process should happen if the input is not a file. CLI cannot find the file, decides it must be a triple but then fails to parse the triple. You can verify the behavior like this: ```auto $ stardog reasoning explain test file_does_not_exist Unexpected end of file [L7] ``` Double check the path your input file is or simply pass the input as a string as above. We'll look into improving the error message to be clearer. Best, Evren ---
**Author:** ![Smlapenna](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/smlapenna/32/1029_2.png) [@Smlapenna](https://community.stardog.com/u/Smlapenna)\ **Post date:** [April 8, 2022, 1:58pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/4 "2022-04-08T13:58:46Z")
Thanks for the suggestions Zachary; here's the outcome: command: stardog reasoning explain -f NTRIPLES ts inf.ttl returns: Expected '\<' or '\_', found: i [L1] > > at least it recognized line 1 command: stardog reasoning explain -f TURTLE ts inf.ttl returns: Unexpected end of file [L7] > > same error as original No errors or exceptions in the stardog.log today. [I executed the above today] ---
**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\ **Post date:** [April 8, 2022, 2:32pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/5 "2022-04-08T14:32:20Z")
Still seems odd that it can't find the file. If there isn't something obvious like you were in the wrong directory try ./inf.ttl and the full path /path/to/my/file/inf.ttl Also, are you running on Linux or Windows? ---
**Author:** ![Smlapenna](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/smlapenna/32/1029_2.png) [@Smlapenna](https://community.stardog.com/u/Smlapenna)\ **Post date:** [April 8, 2022, 2:57pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/6 "2022-04-08T14:57:45Z")
You resolved it. stardog couldn't find the file. Once I changed to the folder where the file resided, I received results. command: stardog reasoning explain -f TURTLE ts inf.ttl returned: assertions and inferences command: stardog reasoning explain ts inf.ttl returned: assertions and inferences command: stardog reasoning explain -f NTRIPLES ts inf.ttl returned: Expected '\<' or '\_', found: : [L1] ---
**Author:** ![zachary.whitley](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/zachary.whitley/32/94_2.png) [@zachary.whitley](https://community.stardog.com/u/zachary.whitley)\ **Post date:** [April 8, 2022, 3:18pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/7 "2022-04-08T15:18:01Z")
My mistake on the NTRIPLES, I didn't notice the empty prefix on the subject. Glad to hear you got it working. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex030/uploads/stardog/original/2X/e/ed66b48a616f505106a4acde3c9cee7e6da9bc67.svg) [@system](https://community.stardog.com/u/system)\ **Post date:** [April 15, 2022, 11:01pm UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/8 "2022-04-15T23:01:13Z")
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**Author:** ![system](https://canada1.discourse-cdn.com/flex030/uploads/stardog/original/2X/e/ed66b48a616f505106a4acde3c9cee7e6da9bc67.svg) [@system](https://community.stardog.com/u/system)\ **Post date:** [April 24, 2022, 11:19am UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/9 "2022-04-24T11:19:19Z")
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**Author:** ![system](https://canada1.discourse-cdn.com/flex030/uploads/stardog/original/2X/e/ed66b48a616f505106a4acde3c9cee7e6da9bc67.svg) [@system](https://community.stardog.com/u/system)\ **Post date:** [May 3, 2022, 6:54am UTC](https://community.stardog.com/t/inference-engine-gives-unclear-error/3668/10 "2022-05-03T06:54:59Z")