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Right-click the Table Indicator and 'Create Constant'. What you will notice is that the data type of the Table is a 2-D array of strings and you are creating a 1-D array. Add one more build array and it will work (right-click the broken wire and it will even give you the option to insert Build Array). Transpose the array as desired.

Fortunately, if you can't get them to work as intended, they gracefully fall back to "draw something that looks like this picture" mode

Yup great advice. The only thing I'd add is that the case structure can show a radix when a numeric is wired to it. So you can choose to view it in Hex which I assume would be easier for you. But of course if you have a CAN DBC file and you want to perform the frame to signal conversion without all the hassle of parsing each frame manually, you could look into leveraging the XNet API to perform the conversion for you. https://decibel.ni.com/content/docs/DOC-39793 But if you just want to convert a few manually that's fine too, it won't require the XNet API and probably would be faster because of it.

I wrote Robust CSV for this purpose: http://lavag.org/files/file/239-robust-csv/ Just specify the delimiter as Tab.