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ActivitiException: unknown variable type name alfrescoScriptNode

Question asked by flexicoder on Apr 25, 2013
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I am using alfresco community edition and its activiti workflow engine. I want to access activiti tasks and executions in my java classes; set and get some variables. but there is a problem in RuntimeService It throws an exception when call its method:

org.activiti.engine.ProcessEngine.getRuntimeService().getVariables(taskExecutionId))


It throws:

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.activiti.engine.ActivitiException: unknown variable type name alfrescoScriptNode
### The error may involve org.activiti.engine.impl.persistence.entity.VariableInstanceEntity.selectVariablesByExecutionId-Inline
### The error occurred while setting parameters
### Cause: org.activiti.engine.ActivitiException: unknown variable type name alfrescoScriptNode
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:8)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:77)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:69)
at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:182)
at org.activiti.engine.impl.persistence.entity.VariableInstanceManager.findVariableInstancesByExecutionId(VariableInstanceManager.java:47)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.loadVariableInstances(ExecutionEntity.java:880)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.ensureVariableInstancesInitialized(VariableScopeImpl.java:57)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.collectVariables(VariableScopeImpl.java:78)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.getVariables(VariableScopeImpl.java:65)
at org.activiti.engine.impl.cmd.GetExecutionVariablesCmd.execute(GetExecutionVariablesCmd.java:58)
at org.activiti.engine.impl.cmd.GetExecutionVariablesCmd.execute(GetExecutionVariablesCmd.java:28)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.activiti.engine.impl.RuntimeServiceImpl.getVariables(RuntimeServiceImpl.java:81)


I searched about it but there was no relevant result.

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