Summary
Pins of the CallOperationAction do not match the operations parameters.
Details
UML constraints:
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The number of argument pins and the number of owned parameters of type in and in-out belonging to the operation must be equal.
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The number of result pins and the number of owned parameters of type return, out, and in-out belonging to the operation must be equal.
Example:

The createProject CallOperationAction is invalid, because the projectPriority parameter of the createProject operation that it calls is not matched to one of its pins.
Tips
When you get a R1140 warning on a CallOperationAction you can resolve it by doing one of the following:
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Remove any unmatched parameters from the called operation or match it to an unmatched pin of the calling action.
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Remove any unmatched pins from the calling action or match it with any unmatched parameter of the called operation.