The Maximum COMMAREA Length generation property field was set to a numeric value that is less than the calculated length of one of the messages used as either input or output on the specified Invoke node.
This is only a warning so no action is required. However, because this length discrepancy may cause a storage violation at runtime, you should consider making one of the following changes in the Maximum COMMAREA Length field in the generation properties editor:
Set the value to a number greater than calculated length of the input message and greater than the calculated length of the output message.
Select Generate length value and let the Generate Runtime Code wizard calculate the value automatically.
See Generation properties of the LINK with COMMAREA invoke type.