How to retrieve line Item values from an object using groovy

def RevenueObject = nvl(ChildRevenue,0);
println('revenueItems==='+revenueItems.size());
while(RevenueObject.hasNext())
def revenueLine = RevenueObject.next();
revenueLine.setAttribute('Test_c', 'Hello');
} Groovy Scripting
Error : Getting null value for Revenue object
Exception in expression "OpportunityEO" trigger "getRevenueItems" : groovy.lang.MissingMethodException : No signature of method: oracle.jbo.server.ViewRowSetIteratorImpl.size() is applicable for argument types: () values: [] Possible solutions: is(java.lang.Object), find(), use([Ljava.lang.Object;), with(groovy.lang.Closure), sleep(long), find(groovy.lang.Closure)
at "OpportunityEO" trigger "getRevenueItems" line 7
No signature of method: oracle.jbo.server.ViewRowSetIteratorImpl.size() is applicable for argument types: () values: [] Possible solutions: is(java.lang.Object), find(), use([Ljava.lang.Object;), with(groovy.lang.Closure), sleep(long), find(groovy.lang.Closure)

Depending on the message the line number might be in one of the fields:
MESSAGE_V1
MESSAGE_V2
MESSAGE_V3
MESSAGE_V4
Although if the message simply is not meant to include the line number, it won't be there. That's the way it is. If there is a user exit available, you may add your custom messages with the line number. In some user exits (in sales order for sure) there is a special variable (flag), which is set when the BAPI runs the transaction.

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How to retrieve line Item values from an object using groovy

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