I have another Class problem, how could i resolve this problem?

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The error:

Declared return type class hu.rate.jarkon.Ugyfel is not compatible with evaluated type class hu.rate.jarkon.Ugyfel_$$_jvst564_5a for expression ugyfel
at org.bonitasoft.engine.execution.StateBehaviors.executeOperations(StateBehaviors.java:652)
at org.bonitasoft.engine.execution.state.ExecutingAutomaticActivityStateImpl.onEnterToOnFinish(ExecutingAutomaticActivityStateImpl.java:50)
at org.bonitasoft.engine.execution.state.OnEnterAndFinishConnectorState.execute(OnEnterAndFinishConnectorState.java:74)
at org.bonitasoft.engine.execution.state.OnEnterAndFinishConnectorState.execute(OnEnterAndFinishConnectorState.java:33)
at org.bonitasoft.engine.execution.FlowNodeExecutorImpl.executeState(FlowNodeExecutorImpl.java:121)
at org.bonitasoft.engine.execution.FlowNodeExecutorImpl.updateState(FlowNodeExecutorImpl.java:179)
at org.bonitasoft.engine.execution.FlowNodeExecutorImpl.stepForward(FlowNodeExecutorImpl.java:160)
at org.bonitasoft.engine.execution.FlowNodeExecutorImpl.executeFlowNode(FlowNodeExecutorImpl.java:337)
at org.bonitasoft.engine.execution.work.ExecuteFlowNodeWork.work(ExecuteFlowNodeWork.java:73)
at org.bonitasoft.engine.execution.work.TxBonitaWork.lambda$work$0(TxBonitaWork.java:41)
at org.bonitasoft.engine.transaction.JTATransactionServiceImpl.executeInTransaction(JTATransactionServiceImpl.java:286)
at org.bonitasoft.engine.execution.work.TxBonitaWork.work(TxBonitaWork.java:41)
at org.bonitasoft.engine.execution.work.LockProcessInstanceWork.work(LockProcessInstanceWork.java:68)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.InSessionBonitaWork.work(InSessionBonitaWork.java:60)
at org.bonitasoft.engine.work.BonitaThreadPoolExecutor.lambda$submit$1(BonitaThreadPoolExecutor.java:131)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.bonitasoft.engine.core.operation.exception.SOperationExecutionException: org.bonitasoft.engine.expression.exception.SExpressionEvaluationException: FLOW_NODE_INSTANCE_ID=9801879 | Declared return type class hu.rate.jarkon.Ugyfel is not compatible with evaluated type class hu.rate.jarkon.Ugyfel_$$_jvst564_5a for expression ugyfel
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.evaluateRightOperandExpression(OperationServiceImpl.java:228)
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.calculateRightOperandValue(OperationServiceImpl.java:133)
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.executeOperators(OperationServiceImpl.java:114)
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.execute(OperationServiceImpl.java:101)
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.execute(OperationServiceImpl.java:85)
at org.bonitasoft.engine.execution.StateBehaviors.executeOperations(StateBehaviors.java:649)
... 20 more
Caused by: org.bonitasoft.engine.expression.exception.SExpressionEvaluationException: FLOW_NODE_INSTANCE_ID=9801879 | Declared return type class hu.rate.jarkon.Ugyfel is not compatible with evaluated type class hu.rate.jarkon.Ugyfel_$$_jvst564_5a for expression ugyfel
at org.bonitasoft.engine.expression.impl.ReturnTypeChecker.checkReturnType(ReturnTypeChecker.java:82)
at org.bonitasoft.engine.expression.impl.ExpressionServiceImpl.evaluate(ExpressionServiceImpl.java:173)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionsOfKind(ExpressionResolverServiceImpl.java:249)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateAllExpressionsWithNoDependencies(ExpressionResolverServiceImpl.java:198)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionsFlatten(ExpressionResolverServiceImpl.java:121)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluate(ExpressionResolverServiceImpl.java:86)
at org.bonitasoft.engine.core.operation.impl.OperationServiceImpl.evaluateRightOperandExpression(OperationServiceImpl.java:221)
... 25 more

The script itself was simple, i used the ugyfelDAO to get one instance of Ugyfel, and then returned it. The script was in a service task operation.

I get this error a lot, and i dont know why this is happening.

Any idea how i could solve this issue?

No answers yet.
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