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I recently set up Mathematica 9.0.1 on a new computer, along with x64 Eclipse Indigo with JRE 1.7, and the Wolfram Workbench 2 plug-in. Something is amiss, because when I try to do any sort of task involving Mathematica from inside Workbench, I get the same error message:

An internal error occurred during: "FrontEnd Job::Open Notebook".
 com.wolfram.jlink.NativeLink.MLOpenString(Ljava/lang/String;[Ljava/lang/String;)J

Otherwise, Mathematica works fine, as does the Eclipse install when used for other purposes (Java and Scala development).

This is a 64 bit Windows 7 machine.

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marked as duplicate by Ajasja, Artes, Jens, m_goldberg, Silvia Apr 27 '13 at 5:59

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
have you tried installing Wokrbench as a standalone application? – Misery Apr 26 '13 at 16:02
    
Isn't it connected with 64 bit and java? (I know similar issue from Linux system) – mmal Apr 26 '13 at 16:07
    
at the moment, i'd really prefer to keep using Indigo if at all possible. – Pillsy Apr 26 '13 at 16:11
    
For me, Eclipse 3.7.2 is the latest version supporting the workbench plugin. – b.gatessucks Apr 26 '13 at 16:22
    
@b.gatessucks I'm currently using Eclipse 3.7.2. – Pillsy Apr 26 '13 at 16:48

In the comments to this answer Rolf Mertig mentions that you have to use the 32 bit version of Eclipse.

(So I guess we can close this as a duplicate?)

I just installed WB into 32bit eclipse 3.7.2 on Win7 64bit and everything works great!

Screen shot

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I have found a way to avoid a 32-bit re-installation of Eclipse, based on help from Wolfram support. Would it be inappropriate to add it either here, or to the other question? – Pillsy Apr 30 '13 at 18:51
    
@Pillsy Hmm good question. I would definitely add this somewhere! You can't add it here (right now) as we would first have to reopen the question. I guess you can add it as an answer to the other question. Then it can be moved by the admins if necessary. – Ajasja Apr 30 '13 at 19:18
    
related software.additive-net.de/en/support/wolfram-support/… (you'll need to translate from german) – faysou Dec 20 '14 at 22:12

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