NoClassDefFoundError when not in Eclipse

Question

I developed a standalone app in eclipse, and it works fine. I created the .jar file, and set it up for distribution, but when i execute it outside of Eclipse, i get a NoClassDefFound error on JCO$Record.
I can see the class in the sapjco.jar file, and i have this file on my classpath. i also have my JCO install folder in my path, so windows can find the .dlls.
I am not sure what is wrong. I check my classpath and path immediately after the exception, and they look fine. i am specifying the classpath with a set statement, and not the -cp extension, if that makes a difference.

Answer 1

actually, i already do what you suggest. here is my .bat file (please disregard strange newlines in SETs):
@echo off
set OCP=%CLASSPATH%
set OP=%PATH%
set CLASSPATH=c:\JCO\sapjco.jar
set CLASSPATH=%CLASSPATH%;c:\xerces-1_4_4\xerces.jar
set CLASSPATH=%CLASSPATH%;c:\java\MSJDBC\lib\mssqlserver.jar
set CLASSPATH=%CLASSPATH%;c:\com\siemens\SMMSAPInterface.jar
set CLASSPATH=%CLASSPATH%;c:\java\j2sdk1.4.2\jre\lib\rt.jar;
set PATH=%PATH%;c:\jco\;
java -verbose:class -cp %CLASSPATH% -jar c:\com\siemens\SMMSAPInterface.jar
set CLASSPATH=%OCP%
set PATH=%OP%
the CLASSPATH% variable and PATH variable are correct when i look at them (before the final 2 sets), but jvm sill cannot fin sapjco.jar in c:\jco