# DL4J Nodes **URL:** \ **Category:** KNIME Extensions\ **Tags:** deep-learning\ **Created:** [April 4, 2018, 3:37pm UTC](https://forum.knime.com/t/dl4j-nodes/10677 "2018-04-04T15:37:16Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 4, 2018, 3:37pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/1 "2018-04-04T15:37:16Z")
I have the DL4J nodes installed. I’ve downloaded several of the examples from the example server and none work. I have no idea what the problem is. Any help would be appreciated. ---
**Author:** ![christian.birkhold](https://forum-cdn.knime.com/user_avatar/forum.knime.com/christian.birkhold/32/346_2.png) [@christian.birkhold](https://forum.knime.com/u/christian.birkhold)\ **Post date:** [April 4, 2018, 3:50pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/2 "2018-04-04T15:50:39Z")
Hey @rfeigel, Can you double-check the memory set in `File -> Preferences -> DeepLearning4J`? Can you maybe increase it to 4000m? Also, an error message would help us debugging your problem 🙂 Cheers, Christian ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 4, 2018, 4:46pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/3 "2018-04-04T16:46:17Z")
Example 07 Simple Document Classification Using Word Vector Error : ERROR Doc2Vec Learner 0:95 Execute failed: Could not initialize class org.nd4j.linalg.factory.Nd4j ---
**Author:** ![christian.birkhold](https://forum-cdn.knime.com/user_avatar/forum.knime.com/christian.birkhold/32/346_2.png) [@christian.birkhold](https://forum.knime.com/u/christian.birkhold)\ **Post date:** [April 4, 2018, 6:00pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/4 "2018-04-04T18:00:03Z")
Hi @rfeigel, did you try to increase the memory in the preferences? Cheers, Christian ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 4, 2018, 6:20pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/5 "2018-04-04T18:20:03Z")
Yes. 4000m ---
**Author:** ![christian.birkhold](https://forum-cdn.knime.com/user_avatar/forum.knime.com/christian.birkhold/32/346_2.png) [@christian.birkhold](https://forum.knime.com/u/christian.birkhold)\ **Post date:** [April 4, 2018, 6:27pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/6 "2018-04-04T18:27:37Z")
Hm, any chance you can attach the KNIME log file? Would make debugging easier. Also increasing the memory further (e.g. 6000) may help in this case. Just to be sure 🙂 Best, Christian ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 4, 2018, 8:00pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/7 "2018-04-04T20:00:58Z")
Log file attached. Also increased heap to 6000 which did not help. I think there is a problem in the grouping in the example file, but I’m too inexperienced to figure it out. [knime.log](https://forum-cdn.knime.com/uploads/default/original/1X/adf397aff97cc432d6519455bb2049b00f5b84e3.log) (1.2 MB) ---
**Author:** ![christian.birkhold](https://forum-cdn.knime.com/user_avatar/forum.knime.com/christian.birkhold/32/346_2.png) [@christian.birkhold](https://forum.knime.com/u/christian.birkhold)\ **Post date:** [April 5, 2018, 6:56am UTC](https://forum.knime.com/t/dl4j-nodes/10677/8 "2018-04-05T06:56:53Z")
`java.lang.UnsatisfiedLinkError: java.io.FileNotFoundException: C:\Users\User\.javacpp\cache\jniopenblas.dll\jniopenblas.dll (Access is denied)` can you try to start KNIME Analytics Platform as an administrator? ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 5, 2018, 12:13pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/9 "2018-04-05T12:13:56Z")
Ran as administrator. Same problem. ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 5, 2018, 12:17pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/10 "2018-04-05T12:17:43Z")
Here’s the error message: ERROR Doc2Vec Learner 0:95 Execute failed: java.io.FileNotFoundException: C:\Users\User.javacpp\cache\jniopenblas.dll\jniopenblas.dll (The requested operation cannot be performed on a file with a user-mapped section open) ---
**Author:** ![christian.birkhold](https://forum-cdn.knime.com/user_avatar/forum.knime.com/christian.birkhold/32/346_2.png) [@christian.birkhold](https://forum.knime.com/u/christian.birkhold)\ **Post date:** [April 5, 2018, 12:19pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/11 "2018-04-05T12:19:39Z")
> [@rfeigel](#): > > C:\Users\User.javacpp\cache\jniopenblas.dll\jniopenblas.dll (The requested operation cannot be performed on a file with a user-mapped section open) It seems that another process is locking this file (e.g. visual studio, windows defender etc). See also [windows - The requested operation cannot be performed on a file with a user-mapped section open - Stack Overflow](https://stackoverflow.com/questions/4658354/the-requested-operation-cannot-be-performed-on-a-file-with-a-user-mapped-section) ---
**Author:** ![rfeigel](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/r/7ea924/32.png) [@rfeigel](https://forum.knime.com/u/rfeigel)\ **Post date:** [April 5, 2018, 1:06pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/12 "2018-04-05T13:06:29Z")
Christian: Thanks very much. You’ve identified the problem. I rebooted as administrator and it ran fine. I suspect the problem is one of my virus programs (Bitdefender). Its very aggressive in blocking all sorts of things. I’ll try to white list the dll. ---
**Author:** ![system](https://forum-cdn.knime.com/uploads/default/original/1X/ab3ccf34482a0329361734a18199390177204f15.png) [@system](https://forum.knime.com/u/system)\ **Post date:** [April 12, 2018, 1:06pm UTC](https://forum.knime.com/t/dl4j-nodes/10677/13 "2018-04-12T13:06:46Z")
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