# Unable to load simple ontology **URL:** \ **Category:** Support\ **Created:** [April 25, 2019, 5:08pm UTC](https://community.stardog.com/t/unable-to-load-simple-ontology/1617 "2019-04-25T17:08:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![serge](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/serge/32/376_2.png) [@serge](https://community.stardog.com/u/serge)\ **Post date:** [April 25, 2019, 5:08pm UTC](https://community.stardog.com/t/unable-to-load-simple-ontology/1617/1 "2019-04-25T17:08:23Z")
I created a simple ontology using protege. however I am unable to load using the following command `stardog data add --named-graph http://topology/ontology Test ontology.ttl` My files look something like ``` @prefix owl: . @prefix rdf: . @prefix xml: . @prefix xsd: . @prefix rdfs: . @prefix asset: . @base . [ rdf:type owl:Ontology ] . ################################################################# # Object Properties ################################################################# ### http://topology/asset#consistsOf asset:consistsOf rdf:type owl:ObjectProperty ; owl:inverseOf asset:partOf . ### http://topology/asset#partOf asset:partOf rdf:type owl:ObjectProperty . ################################################################# # Classes ################################################################# ### http://topology/asset#Device asset:Device rdf:type owl:Class . ### Generated by the OWL API (version 4.5.9.2019-02-01T07:24:44Z) https://github.com/owlcs/owlapi ``` and I get the following error message ``` Adding data from file: ontology.ttl An error occurred adding RDF to the index: C:\mnt\c\Users\serge.colle\Documents\git\rdf-workspace\ontology.ttl ``` The error logs shows the following ``` RROR 2019-04-25 12:29:59,052 [stardog-user-33] com.stardog.http.server.undertow.ErrorHandling:writeError(138): Unexpected error on the server com.complexible.stardog.db.DatabaseException: An error occurred adding RDF to the index: C:\mnt\c\Users\serge.colle\Documents\git\rdf-workspace\ontology.ttl at com.complexible.stardog.db.DatabaseConnectionImpl.throwDatabaseException(DatabaseConnectionImpl.java:718) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DatabaseConnectionImpl.add(DatabaseConnectionImpl.java:743) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DelegatingDatabaseConnection.add(DelegatingDatabaseConnection.java:226) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DatabaseImpl$DBConnectionWrapper.add(DatabaseImpl.java:1425) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DelegatingDatabaseConnection.add(DelegatingDatabaseConnection.java:226) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.StardogKernel$KernelDbConnection.add(StardogKernel.java:3358) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DelegatingDatabaseConnection.add(DelegatingDatabaseConnection.java:226) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.StardogKernel$NotifyingDatabaseConnection.add(StardogKernel.java:3454) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.protocols.http.server.TransactionService.lambda$null$2(TransactionService.java:187) ~[stardog-protocols-http-server-6.1.2.jar:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Unknown Source) ~[?:1.8.0_201] at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) ~[?:1.8.0_201] at com.complexible.stardog.protocols.http.server.TransactionService.lambda$processUpdate$3(TransactionService.java:187) ~[stardog-protocols-http-server-6.1.2.jar:?] at com.complexible.stardog.protocols.http.server.TransactionService.processUpdate(TransactionService.java:213) ~[stardog-protocols-http-server-6.1.2.jar:?] at com.complexible.stardog.protocols.http.server.TransactionService.processUpdate(TransactionService.java:183) ~[stardog-protocols-http-server-6.1.2.jar:?] at com.complexible.stardog.protocols.http.server.TransactionService.add(TransactionService.java:170) ~[stardog-protocols-http-server-6.1.2.jar:?] at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192) ~[stardog-protocols-http-server-6.1.2.jar:?] at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) [shiro-core-1.2.3.jar:1.2.3] at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) [shiro-core-1.2.3.jar:1.2.3] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_201] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_201] at java.lang.Thread.run(Unknown Source) [?:1.8.0_201] Caused by: com.complexible.stardog.StardogException: An error occurred adding RDF to the index: C:\mnt\c\Users\serge.colle\Documents\git\rdf-workspace\ontology.ttl at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl$IndexResourceTransaction.apply(ConnectableIndexRWConnectionImpl.java:653) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl.apply(ConnectableIndexRWConnectionImpl.java:376) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.ConnectableConnectionCollection.apply(ConnectableConnectionCollection.java:210) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DatabaseConnectionImpl.add(DatabaseConnectionImpl.java:739) ~[stardog-6.1.2.jar:?] ... 19 more Caused by: com.complexible.stardog.index.IndexException: C:\mnt\c\Users\serge.colle\Documents\git\rdf-workspace\ontology.ttl at com.complexible.stardog.index.IndexWriterDataMapImpl.update(IndexWriterDataMapImpl.java:118) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.IndexWriterDataMapImpl.add(IndexWriterDataMapImpl.java:68) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.IndexWriterImpl.add(IndexWriterImpl.java:174) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.impl.DelegatingIndexWriter.add(DelegatingIndexWriter.java:51) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.Indexes.add(Indexes.java:378) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl$IndexResourceTransaction.apply(ConnectableIndexRWConnectionImpl.java:637) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl.apply(ConnectableIndexRWConnectionImpl.java:376) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.ConnectableConnectionCollection.apply(ConnectableConnectionCollection.java:210) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DatabaseConnectionImpl.add(DatabaseConnectionImpl.java:739) ~[stardog-6.1.2.jar:?] ... 19 more Caused by: java.nio.file.NoSuchFileException: C:\mnt\c\Users\serge.colle\Documents\git\rdf-workspace\ontology.ttl at sun.nio.fs.WindowsException.translateToIOException(Unknown Source) ~[?:1.8.0_201] at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) ~[?:1.8.0_201] at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) ~[?:1.8.0_201] at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown Source) ~[?:1.8.0_201] at java.nio.file.Files.newByteChannel(Unknown Source) ~[?:1.8.0_201] at java.nio.file.Files.newByteChannel(Unknown Source) ~[?:1.8.0_201] at java.nio.file.spi.FileSystemProvider.newInputStream(Unknown Source) ~[?:1.8.0_201] at java.nio.file.Files.newInputStream(Unknown Source) ~[?:1.8.0_201] at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFFileStream.openInputStream(RDFStreamBuilder.java:387) ~[stardog-utils-rdf-6.1.2.jar:?] at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:208) ~[stardog-utils-rdf-6.1.2.jar:?] at com.complexible.common.rdf.rio.RDFStreamProcessor$ConcurrentLoadManagerImpl.add(RDFStreamProcessor.java:519) ~[stardog-utils-rdf-6.1.2.jar:?] at com.complexible.common.rdf.rio.RDFStreamProcessor.add(RDFStreamProcessor.java:236) ~[stardog-utils-rdf-6.1.2.jar:?] at com.complexible.stardog.index.IndexWriterDataMapImpl.update(IndexWriterDataMapImpl.java:113) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.IndexWriterDataMapImpl.add(IndexWriterDataMapImpl.java:68) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.IndexWriterImpl.add(IndexWriterImpl.java:174) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.impl.DelegatingIndexWriter.add(DelegatingIndexWriter.java:51) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.index.Indexes.add(Indexes.java:378) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl$IndexResourceTransaction.apply(ConnectableIndexRWConnectionImpl.java:637) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl.apply(ConnectableIndexRWConnectionImpl.java:376) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.ConnectableConnectionCollection.apply(ConnectableConnectionCollection.java:210) ~[stardog-6.1.2.jar:?] at com.complexible.stardog.db.DatabaseConnectionImpl.add(DatabaseConnectionImpl.java:739) ~[stardog-6.1.2.jar:?] ... 19 more ``` ---
**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 25, 2019, 8:45pm UTC](https://community.stardog.com/t/unable-to-load-simple-ontology/1617/2 "2019-04-25T20:45:27Z")
Looks like it can't find the file. You might have a permission problem. It might need to be readable as the user that is running the server if you're running the client and server on localhost. ---
**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 9, 2019, 8:45pm UTC](https://community.stardog.com/t/unable-to-load-simple-ontology/1617/3 "2019-05-09T20:45:31Z")
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