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I created a new very easy Acceleo project, with just one main module generate.mtl that tries to create a new file. The package is exported in the Manifest. When I launch the .mtl file, I get this error 

!MESSAGE Couldn't load class org.eclipse.acceleo.module.sample.main.Generate. Check that its containing package is exported.

!MESSAGE Couldn't load class org.eclipse.acceleo.module.sample.main.Generate from project org.eclipse.acceleo.module.sample

I don't really know why and what to do.

DeLac
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4 Answers4

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I had a similar problem and I solved it by adding the bin directory to the classpath in the Manifest file.

I did this because of Etienne's answer here: Can't generate java from UML using Acceleo in Eclipse1

When you open up the MANIFEST.MF with the "Plugin Manifest Editor", there is a "Runtime" tab at the bottom. On the right side bottom of that screen there is a place to edit the classpath. I added "bin/"

After that, I had no problems with loading the class.

Community
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jpcahoon
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I solved using the version 3.4 of Acceleo, instead of the 3.5. The 3.4 works

DeLac
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Your solution @jpcahoon - Solved my problem with Acceleo 3.5.1

Prophet Daniel
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I had the same problem today despite having the Classpath declared in the Manifest file. The solution for me was to tweak the Execution Environment in the Overview tab of the manifest file (In my case, setting it to JavaSE-1.6 solved the problem).

m .k
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