I have a single multi-instance DMN decision task (MI could be both parallel and sequantial) where for each iteration I want to get the “loopCounter” variable mentioned in the docs. In all my efforts I failed to access this variable.
How should I position the script to access it? I tried execution listeners on both start and end of the MI DMN task and both var counter = execution.getVariableLocal(“loopCounter”) and var counter = execution.getVariable(“loopCounter”). Unfortunately, neither is working. In all I get the following error in the Cockpit:
org.camunda.bpm.engine.ScriptEvaluationException: Unable to evaluate script while executing activity ‘Activity_0h49bxx’ in the process definition with id ‘multiInstanceDMNSandbox:12:e50adca6-a989-11eb-93e4-0242ac110002’::7:41 Expected an operand but found error
var counter = execution.getVariableLocal(“loopCounter”);
^ in at line number 7 at column number 41
at org.camunda.bpm.engine.impl.scripting.SourceExecutableScript.evaluate(SourceExecutableScript.java:71)
at org.camunda.bpm.engine.impl.scripting.ExecutableScript.execute(ExecutableScript.java:63)
at org.camunda.bpm.engine.impl.scripting.env.ScriptingEnvironment.execute(ScriptingEnvironment.java:101)
at org.camunda.bpm.engine.impl.scripting.env.ScriptingEnvironment.execute(ScriptingEnvironment.java:87)
at org.camunda.bpm.engine.impl.delegate.ScriptInvocation.invoke(ScriptInvocation.java:47)
at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:58)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocationInContext(DefaultDelegateInterceptor.java:92)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:63)
at org.camunda.bpm.engine.impl.bpmn.listener.ScriptExecutionListener.notify(ScriptExecutionListener.java:43)
at org.camunda.bpm.engine.impl.bpmn.listener.ScriptExecutionListener.notify(ScriptExecutionListener.java:30)
at org.camunda.bpm.engine.impl.core.instance.CoreExecution.invokeListener(CoreExecution.java:101)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:55)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:99)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.invokeNext(CommandInvocationContext.java:131)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performNext(CommandInvocationContext.java:111)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performOperation(CommandInvocationContext.java:86)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performOperation(CommandInvocationContext.java:76)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:643)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:618)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:62)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:99)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.invokeNext(CommandInvocationContext.java:131)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performNext(CommandInvocationContext.java:111)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performOperation(CommandInvocationContext.java:86)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:634)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:608)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationActivityStartCreateScope.scopeCreated(PvmAtomicOperationActivityStartCreateScope.java:43)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:54)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:28)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:99)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.invokeNext(CommandInvocationContext.java:131)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performNext(CommandInvocationContext.java:118)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performOperation(CommandInvocationContext.java:86)
at org.camunda.bpm.engine.impl.interceptor.CommandInvocationContext.performOperation(CommandInvocationContext.java:76)
at org.camunda.bpm.engine.impl.jobexecutor.AsyncContinuationJobHandler.execute(AsyncContinuationJobHandler.java:81)
at org.camunda.bpm.engine.impl.jobexecutor.AsyncContinuationJobHandler.execute(AsyncContinuationJobHandler.java:40)
at org.camunda.bpm.engine.impl.persistence.entity.JobEntity.execute(JobEntity.java:134)
at org.camunda.bpm.engine.impl.cmd.ExecuteJobsCmd.execute(ExecuteJobsCmd.java:110)
at org.camunda.bpm.engine.impl.cmd.ExecuteJobsCmd.execute(ExecuteJobsCmd.java:43)
at org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:28)
at org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:110)
at org.camunda.bpm.engine.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:72)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140)
at org.camunda.bpm.engine.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:70)
at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:70)
at org.camunda.bpm.engine.impl.interceptor.CommandCounterInterceptor.execute(CommandCounterInterceptor.java:35)
at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobHelper.executeJob(ExecuteJobHelper.java:57)
at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobsRunnable.executeJob(ExecuteJobsRunnable.java:110)
at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobsRunnable.run(ExecuteJobsRunnable.java:71)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.script.ScriptException: :7:41 Expected an operand but found error
var counter = execution.getVariableLocal(“loopCounter”);
^ in at line number 7 at column number 41
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:477)
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:544)
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:531)
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:409)
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:162)
at java.scripting/javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:233)
at org.camunda.bpm.engine.impl.scripting.SourceExecutableScript.evaluateScript(SourceExecutableScript.java:125)
at org.camunda.bpm.engine.impl.scripting.SourceExecutableScript.evaluate(SourceExecutableScript.java:65)
… 52 more
Caused by: jdk.nashorn.internal.runtime.ParserException: :7:41 Expected an operand but found error
var counter = execution.getVariableLocal(“loopCounter”);
^
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(AbstractParser.java:297)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(AbstractParser.java:282)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.unaryExpression(Parser.java:4462)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.expression(Parser.java:4620)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.conditionalExpression(Parser.java:4772)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.assignmentExpression(Parser.java:4711)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.argumentList(Parser.java:3728)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.leftHandSideExpression(Parser.java:3410)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.unaryExpression(Parser.java:4440)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.expression(Parser.java:4620)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.conditionalExpression(Parser.java:4772)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.assignmentExpression(Parser.java:4711)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.variableDeclarationList(Parser.java:1633)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.variableStatement(Parser.java:1532)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.statement(Parser.java:1042)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.sourceElements(Parser.java:909)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.program(Parser.java:844)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.parse(Parser.java:325)
at jdk.scripting.nashorn/jdk.nashorn.internal.parser.Parser.parse(Parser.java:285)
at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.Context.compile(Context.java:1500)
at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.Context.compileScript(Context.java:1467)
at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.Context.compileScript(Context.java:750)
at jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:542)
… 58 more
