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When trying to run any rascal file in eclipse (by right-clicking on file in Rascal Navigator and pressing Run as → Rascal Application), I get this error

An internal error occurred during: "Launching Hello.rsc".
No such Java method:
org.rascalmpl.library.Prelude.remove(org.eclipse.imp.pdb.facts.ISourceLocation, /
org.rascalmpl.interpreter.IEvaluatorContext)

(/ here used as a line separator.)

I haven't had this problem on this installation before. 

java version:    1.7.0_65
Eclipse version: 4.2.2 (Juno)
Rascal version:  0.6.2.201312171007

Update

It seems that there are more things that don't work.

If I import a standard module, like

import IO;

I get this error:

could not load module import IO;[No such Java method:
org.rascalmpl.library.Prelude.remove(org.eclipse.imp.pdb.facts.ISourceLocation, /
org.rascalmpl.interpreter.IEvaluatorContext)

And if I try to use the syntax construct:

module Syntax

start syntax Program = Expr;
...
[rest of syntax-declarations]

Then I get this error:

could not load module start syntax Program = Expr;[value(...) /
is not allowed in patterns

So it might be that the problem is more fundamental than simply not being able to run files/load them into the console.

Guildenstern
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  • Hi! This sounds more like a bug report to me! Could you submit it to github issues https://github.com/cwi-swat/rascal/issues ? BTW, it looks like something went wrong after an upgrade and a refresh, or quitting Eclipse and starting with the `-clean` option might solve the problem. – Jurgen Vinju Sep 22 '14 at 13:57
  • @jurgenv I tried to use `eclipse -clean`, it didn't seem to work. I've updated the question now; do you still think it is a bug, as opposed to for example a broken installation? If so I'll make it into an issue. – Guildenstern Sep 22 '14 at 15:28
  • Looks like some complex interaction indeed. I guess it is a bug, but a rare one since it only happens if you have the Rascal project itself cloned and loaded and a much older installed version of a release. It may dissappear if you use the unstable release instead. – Jurgen Vinju Sep 22 '14 at 17:57

1 Answers1

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I had rascal (git clone of this repository) as part of my workspace. I deleted that repository and now things seem to be back to normal (can load files into console etc.).

Guildenstern
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