1543710 - Running wdeploy you get a BUILD FAILED error

You run wdeploy and you get the following error during the build of the wars or ear files.

validateconfig_fork:                                                                                                                
                                                                                                                                   
BUILD FAILED                                                                                                                        
java.lang.UnsupportedClassVersionError:                                                                                             
com/sap/engine/deployment/PropertiesHolder (Unsupported major.minor                                                                 
version 49.0                                                                                                                        
)       

and

report_validation_error:                                                                                                           
[WDEPLOY_VALIDATION_EXCEPTION] Unable to connect to Netweaver, please                                                              
check the administrative user name and password, a                                                                                 
nd the administration port.                                                                                                        
                                                                                                                                   
Exception caught: The following error occurred while executing this                                                                
line:                                                                                                                              
D:\Business Objects\deployment\sapappsvr71.xml:90: The following error                                                             
occurred while executing this line:                                                                                                
D:\Business Objects\deployment\wcommon.xml:688: Unable to connect to                                                               
Netweaver, please check the administrative user nam                                                                                
e and password, and the administration port.                                                                                       
Deleting: D:\Business Objects\deployment\workdir\returncode.properties                                                             
                                                                                                                                   
BUILD FAILED                                                                                                                       
D:\Business Objects\deployment\wcommon.xml:1280: Validation Failed.  

• Windows (all)
• Unix (all)
• Linux (all)
• Businessobjects Enterprise XI3.1

report_validation_error, Validation Failed, Netweaver, java, jdk , KBA , BI-BIP-DEP , Webapp Deployment, Networking, Vulnerabilities, Webservices , Problem