while checking for user id its getting the following exception

 null
com.wm.distman.install.DLInitFilesProgressPanel
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1444)
at com.wm.distman.install.InstallerProductProps.processLine(InstallerProductProps.java:693)
at com.wm.distman.install.InstallerProductProps.populateInstallerProductProps(InstallerProductProps.java:789)
at com.wm.distman.install.InstallerProductProps.addInstallerProductProps(InstallerProductProps.java:475)
at com.wm.distman.install.InstallerProductProps.addRemoteInstallerProductProps(InstallerProductProps.java:636)
at com.wm.distman.install.InstallerProductProps.populateRemoteInstallerProductProps(InstallerProductProps.java:382)
at com.wm.distman.install.InstallerProductProps.initInstallerProductProps(InstallerProductProps.java:315)
at com.wm.distman.install.DLInitFilesProgressPanel.readRemoteInstallProps(DLInitFilesProgressPanel.java:342)
at com.wm.distman.install.DLInitFilesProgressPanel.installExecute(DLInitFilesProgressPanel.java:991)
at com.wm.distman.install.PanelThread.run(PanelThread.java:91)

Are you using the latest wMInstaller to create this image?

yes

Sounds like a job for tech support.