JCMAN error

Hi there,

Good day!

I am a new chemaxon user. I tried using the jchemmanager but, receive the following error message,

 Exception in thread “main” java.lang.UnsupportedClassVersionError:

 I have attached the snapshot of the error.  I have also installed the JVM but, could not understand why i receive this error.

Immediate support would be highly appreciated.

Thanks,

Subha

Hi Subha,

You're using a Java version earlier than Java 5. JChem requires Java 5 or later.

Regards,

Peter

Hi Peter,

I have the java 6 update 21 installed in my system.But, still i receive the same error.Is there anything specific i need to do after updating java?

Thanks,

Subha 

Either remove earlier Java versions from your system or make sure that the parent directory of java(w).exe of the Java 6 version (C:\Program Files\Java\jdk1.6.0_20\bin on my system) comes first in the PATH environment variable.

(On my system I set JAVA_HOME to C:\Program Files\Java\jdk1.6.0_20 and my account's PATH variable starts with %JAVA_HOME%\bin.)

Regards,

Peter

Hi Peter,

Good Day!

Sorry for the trouble,but, i have checked everything you have mentioned, JAVA_HOME set to C:\Program Files\Java\jdk1.6.0_21 and the PATH environment variable is placed second, after the JAVA_HOME user variable.

 I did check the jcman.bat and found that the last line is  set JVMPATH=%z%, Do i need to make any alterations in that?

Thanks,

Subha

 

 

Subha,

We would like to confirm what java version the JCMAN application is trying to use.

After starting jcman.bat, there is a command window with the error (as shown in your first post).  After you receive this error, can you please type "java -version" into this same command window and tell us the result.

 

Thanks,

Jonathan Lee

 

Hi Jonathan Lee,

Good day!

It says java version "1.4.2_06"

Java<TM> 2 Runtine Environment, Standard Edition <build 1.4.2_06-b03>

Java HotSpot<TM> Client VM <build 1.4.2_06-b03, mixed mode>

Thanks,

Subha

Subha,

It looks like the version of java that is being used is a version of Java 4 (i.e. 1.4.2)

 

Your problem or similar problems have been solved before:

https://www.chemaxon.com/forum/viewpost15140.html

Please read the forum post and double check the paths on your PATH variable. One thing that I didn't understand from a previous post is

"the PATH environment variable is placed second, after the JAVA_HOME user variable".  

Perhaps explaining this part might help us further debug your issue.

If you would rather skip debugging your path problems, I might suggest downloading a JChem version that includes bundled Java.  You may find it here:

http://www.chemaxon.com/download/jchem/jchem-for-java/

Best Regards,

Jon

Hi Jon,

Good Day!

Thanks for that. I have reinstalled jchem with java.It works now.

Thanks again and Best Regards,

Subha