For the Invoke nonterminal application node specified in the error message, the length of the input messages or the length of the output messages (which are specified in the mappings for this node) is greater than the value specified in Maximum COMMAREA Length field for this node in the generation properties editor
Because this message is a warning rather than an error, no action is required. However, because this length discrepancy can 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.