Sign In Error:An unknown JAS sign in error occurred. Please contact the System Administrator.

------------------------------------------- Resolved   --------------------------------------------------
Error Detail:

When  you try to  login  local web in JDE fat-client, we get the following  error on screen - 

log detail - 

C:\e812\system\OC4J\j2ee\home\log

[MANDATORY]  - [JAS]             Initiating EnterpriseOne startup using configuration location (default_path) as '~JAS_LOCATION~'. 

[MANDATORY]  - [NET]             Created new JdeServerListenerThread, port=6013 

[MANDATORY]  - [NET]             Created new JdeServerListener, port=6013, maxConn=200, maxQueue=100 

[MANDATORY]  - [JAS]             Successfully initialized the EnterpriseOne web engine. 

[WARN  ]  - [JAS]             SecurityServer already exists, no override allowed 

[SEVERE]  - [BASE]            com.jdedwards.database.base.JDBException: [CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized.  java.lang.UnsupportedClassVersionError: Bad version number in .class file

[SEVERE]  - [BASE]            com.jdedwards.database.base.JDBException: [CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized.  com.jdedwards.database.base.JDBException: [CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. 

[SEVERE]  - [BASE]            com.jdedwards.database.base.JDBException: [DATA_SOURCE_NOT_FOUND] Data source for F00921, TBLE not found. ([CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. ) com.jdedwards.services.objectlookup.DataSourceNotFoundException: Data source for F00921, TBLE not found. ([CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. )

[SEVERE]  - [BASE]            com.jdedwards.database.base.JDBException: [DATA_SOURCE_NOT_FOUND] Data source for F00921, TBLE not found. ([CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. ) com.jdedwards.database.base.JDBException: [DATA_SOURCE_NOT_FOUND] Data source for F00921, TBLE not found. ([CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. )

[SEVERE]  - [JAS]             Exception occured in the JDESignon.jdeSignon() :BuildUserSession Failed. com.jdedwards.database.base.JDBException: [DATA_SOURCE_NOT_FOUND] Data source for F00921, TBLE not found. ([CONNECTION_MANAGER_BOOT_ERROR] Connection Manager could not be initialized. )

My Resolultlion-
My case, I am try to reinstalled JDK, and sql express, after got the same error, finally I only keep the following file in  MISC folder ,  then It reosolved my problem.