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How do you multiply each row of Attribute A with Attribute of B? Similar to excel operation? I need to convert imperial units to metric.

 

I can multiply the attribute with a User_Parameter and I can also multiply two attibutes together and I can also use the Expression Evaluator. But, for each operation I get about 200 lines of WARNING. What is going on? What is the correct way to multiply two attributes or an attribute with a user_parameter?

What are the warnings you get?

And what input data triggers those warnings?


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