Getting Error while calling XBP Function Module via SAP.net connector

Note that you need to execute function call in a single session so you have to wrap your logic into JCoContext. Try using below method:

try {    JCoContext.begin(destination);    try {       // your function calls here       // probably bapiTransactionCommit.execute(destination);    } catch(AbapException ex) {       // probably bapiTransactionRollback.execute(destination);    } } catch(JCoException ex) {    [...] } finally {    JCoContext.end(destination); }