Matthias Boehm created SYSTEMML-2245:
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             Summary: Missing support for external functions with variable 
number of outputs
                 Key: SYSTEMML-2245
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2245
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


Since the number of outputs of external functions are checked before execution 
(see {{ExternalFunctionProgramBlock.verifyFunctionInputsOutputs}}), it's 
currently impossible to implement user-defined external (i.e., java) functions 
with a variable number of outputs.



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