[antlr-interest] "Cannot launch the debugger"

Terence Parr parrt at cs.usfca.edu
Mon Jun 1 14:25:19 PDT 2009


I'd make sure that your preferences have the right port number. should  
say 49100 for default local port.
Ter
On Jun 1, 2009, at 1:27 PM, Matthew Rawlings wrote:

> I have been getting on fine learning ANTLR. I have written my  
> grammars and executed the examples downloaded from “The Definitive  
> ANTLR Reference”. All grammars work fine from the command line, and  
> most work fine from ANTLRWorks. The only problem is that whenever I  
> separate the tree grammar and parser grammar I get the modal error  
> window in ANTLRWorks titled “Connection Errror”, and stating “Cannot  
> launch the debugger. Time-out waiting to connect to the remote  
> parser.”
>
> Steps to reproduce:
> 	• Download code\tour\trees example from http://www.pragprog.com/titles/tpantlr/source_code
> 	• Double click to start ANTLRWorks jar on the desktop
> 	• Open Eval.g in ANTLRWorks
> 	• Debug Eval.g in ANTLRWorks
> 	• Enter text value of “3+4” and press “OK” button.
> 	• Observe “Operation in Progress” window, and then the modal error  
> window appears.
>
> I am running ANTLRWorks 1.2.3. The JDK is 1.6.0_13 according to Help- 
> >About, the PATH, and JAVA_HOME.
>
> I have read all the newsgroup posts on this, which seems a common  
> error. I have tried rebooting, checking the port is free, etc., etc.  
> There is no Windows firewall.
>
> The example works fine from the command line, just not from  
> ANTLRWorks.
>
> Please, how do I get ANTLRWorks working for separate tree grammars  
> and parser grammars? Is there something I need to do to initiate  
> Expr.g to debug Eval.g?
>
> Regards - Matthew
>
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