User b8a1991876

05-01-2012 17:59:02


I have a strange issue - I went to open instant jchem this morning and it automatically started to re-download the file. I assumed there was a system/version update but this doesn't seem to be the case. Then about halfway through the download I get a java error and cannot proceed. Below are the details of the java error:

Launch file tab:

<?xml version="1.0" encoding="UTF-8"?>

<jnlp spec="1.0+" codebase="">


        <title>Instant JChem (JWS)</title>

        <vendor>Chemaxon Kft.</vendor>

        <description>Instant JChem Java Web Start version</description>

        <description kind="short">Instant JChem</description>

        <homepage href=""/>

        <shortcut online="true">


        <menu submenu="ChemAxon"/>


        <icon href="frame32.gif" kind="default"/>







        <j2se version="1.5+"/>

        <jar href="JNLPInstaller.jar" main="true" download="eager"/>


    <application-desc main-class="">




And in the "exceptions" tab: error in opening zip file

at Method)

at<init>(Unknown Source)

at<init>(Unknown Source)




at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.sun.javaws.Launcher.executeApplication(Unknown Source)

at com.sun.javaws.Launcher.executeMainClass(Unknown Source)

at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)

at Source)

at Source)

Many thanks for any advice. 


ChemAxon 37bb34e128

05-01-2012 21:18:39

Instant JChem 5.7.1 was deployed around lunch time CET and your JWS launcher is trying to install this new version I think. The exception suggests that the .zip file containing this new version was not downloaded correctly.

What happens if you re-launch the application? Does JWS launcher try downloading it again or does it simply fail with the exception? Thanks

User b8a1991876

05-01-2012 21:38:08

Thank you for the quick response. The update launch explains the re-download process. In the meantime I reinstalled java and now everything is working as usual.

Thanks again,