Below is the complete stack of error "SBL-JCA-00313" which customer may see while starting the adapter instance:- 

<Error><ErrorCode>8716601</ErrorCode> </ErrMsg>Socket had incorrect word size:  0.(SBL-JCA-00313)</ErrMsg></Error>
</com.Siebel.common.common.CSSException>
    at com.siebel.om.conmgr.Connection.readPacket (Connection.java:617)
    at com.siebel.om.conmgr.Connection.init (Connection.java:296)
    at com.siebel.om.conmgr.Connection.<init>(Connection.java:140)
    at com.31ebel.om.conmgr.ConnectionManager.open(Connectionkarager.java:13)
    at com.siebel.om.om.CSSModel.login (CSS Hodel.java: 1675)
    at com.siebel.data.SiebelDataBean.login (SiebelDataBean.java:217)
    at com.abco. adapter.sbl.tdeng.TdDataBean.login(TdDataBean.java:649)
    at com.tibco.adapter.sbl.tdeng.TdConnectionFactory.login (taConnectionFactory.java:161)
    at com.tibco.adapter.sbl.tdeng.TdConnectionFactory.connect (TaconnectionFactory.java:121)
    at com.tibco.adapter.sbl.tdeng.TdConnectionPooiManager.CreateConnection (TdConnectionPoolHanager.java:555)
    at com.tibco.adapter.sbl.tdeng.TdConnectionPoolManager.CreateMultipleConnections (TdconnectionPoo ger.java:396)
    at com.ibco. adapter.sbl.tdeng.TdConnectionPool Manager.InitializeConnections (TdconnectionPool Hanager.java:260)
    at com.tibco.adapter.sbl.tdpub.TdPubAppCore.createsiebelConnections (TdPubAppCore.java: 826)
    at com.tibco.adapter.sbl.tdpub.TdPubAppCore.initsiebelConnection (TdPubAppCore.java:781)
    at com.tibco.adapter.sbl.tdpub.TdPubAppCore.onInitialization (TdPubAppCore.java:435)
    at com.tibco.sdk.MappImpl.initialize(HappImpl.java:498)
    at com.tibco.sdk.HDefaultAppImpl.start (HDefaultAppImp1.java: 132)
    at com.tibco.sdk.Happ.start (HAPP.java:221)
    at com.tibco.adapter.abi.tdpub.TdPubAppCoreHelper.StartAdapter (TDPub AppCore Belper.java:319
    at com.t1bco.adapter.sbl.tdpub.TdPubHain.main(TdPubMain.java:69)
<com.siebel.common.common.CSSException>

OS : ALL

lease verify the following at your end to resolve the error:

1. If you have provided the correct Siebel jar (EX. siebel 8.1 jars) path for "tibco.env.CUSTOM_CP_EXT" in file "adsbl.tra" located at bin directory of adapter installation.
2. Global variable SiebelVersion should be set to '7' even if the adapter is connecting to the Siebel application version 8.1. The "Siebel version" parameter should be set to "7" in adsbl.tra also.
3. If correct values are provided for the Run time and Design time connection parameters.

Host: Machine Name:Port(The field 'host' in the connections tab should be assigned the name of the machine that runs the Siebel gateway server.)
Enterprise Server: Enterprise Server Name
Siebel Server:  Siebel Server should be empty 
Object Manager: Object manager name
Username and
Password

Please note that while connecting to Siebel Application version 7.7 or above, Siebel does not expect any value to be specified to the parameter 'Siebel Server'. So do not specify any value (including space or global variable) to the field 'Siebel Server' in the adapter configuration.

Some customer's may face the error "SBL-JCA-00313" while starting the Siebel adapter instance on administrator.