Subject:
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Aaargh...I need some help
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Newsgroups:
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lugnet.robotics.rcx.java
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Date:
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Fri, 19 Sep 2003 12:22:01 GMT
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Viewed:
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5415 times
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Hi,
Can anyone lend a desperate soul a helping hand? Here's my problem:
I've followed the installation directions for windows as outlined in
lejos.sourceforge.net
For your convenience, I've included the instructions here:
Installation of the leJOS environment
1. After you have downloaded the leJOS environment zip file, unzip it to an
arbitrary directory - if you haven't a zip utility, you might try for example
7-Zip, which is available for free.
2. Add the SDK's bin directory to your PATH environment variable.
3. Set the LEJOS_HOME evironment variable to the directory you installed lejos
into:
set LEJOS_HOME=< your lejos directory >
4. Add leJOS's bin directory to your PATH environment variable:
set PATH=%PATH%;%LEJOS_HOME%\bin
5. Add the leJOS classes to your CLASSPATH environment variable:
set
CLASSPATH=%CLASSPATH%;.;%LEJOS_HOME%/lib/classes.jar;%LEJOS_HOME%/lib/pcrcxcomm.jar
6. Set the RCXTTY environment variable to your 'tower' device:
set RCXTTY=COM1 or set RCXTTY=USB.
Alrite, I've done all that. Next, I downloaded the firmware into the RCX. No
problems there.
Then I tried to run the helloworld program. Here are the instructions for it as
well.
1. Open a command shell and change to the examples\hworld directory of your
leJOS installation
2. Compile it using lejosjc.bat instead of javac:
lejosjc.bat HelloWorld.java
3. Create a binary file containing the linked program with lejoslink.bat -o
HelloWorld.bin HelloWorld
When I tried the command in step 3 above, I got an error message:
Fatal error: %CLASSPATH% is not a directory.
My explanation for this is that the CLASSPATH variable does not exist in the
first place. My assumption was proven correct when I restarted windows and found
that indeed, there was no CLASSPATH variable.
Ok, what I then did was reset CLASSPATH as:
set CLASSPATH=LEJOS_HOME/lib/classes.jar;LEJOS_HOME/lib/pcrcxcomm.jar
Why I retried the command in step 3 above, I got another error message:
Can't open zip/jar file: LEJOS_HOME/lib/classes.jar
Can't open zip/jar file: LEJOS_HOME/lib/pcrcxcomm.jar
Right, so there's my problem. Any advice would be a big help. Thanks!!
Tyler
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Message has 2 Replies:
 | | Re: Aaargh...I need some help
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| (...) I would put the following two lines into a batch file which you execute prior to trying to compile and download your lejos programs. set LEJOS_HOME=<some path to lejos directory without a trailing slash> set CLASSPATH=%LEJOS_HOM...cxcomm.jar (...) (21 years ago, 19-Sep-03, to lugnet.robotics.rcx.java)
| | | Re: Aaargh...I need some help
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| (...) 1. Make sure LEJOS_HOME is set properly: echo %LEJOS_HOME% 2. Make sure there is a file lib\classes.jar in your LEJOS_HOME directory: dir %LEJOS_HOME%\lib\classes.jar 3. Try including the percentage signs and using backslashes: set (...) (21 years ago, 19-Sep-03, to lugnet.robotics.rcx.java)
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