Trade feature
Well, you could set a user constraint limiting imports/exports according to consumption/production:

   Imports-to-B ≤ a × Consumption-in-B
   Exports-from-B ≤ b × Production-in-B

where a ≤ 1, b ≤ 1.

They will not actually prohibit transfer (=simultaneous imports and exports to/from B), but will ensure that if any amount is imported into B, at least that amount will be consumed in B, and if any amount is exported, at least that amount will be produced in B.

As far as I can see, strictly prohibiting simultaneous imports and exports is not possible.

Messages In This Thread
Trade feature - by seungwoo.kang - 30-11-2016, 02:13 PM
RE: Trade feature - by Antti-L - 01-12-2016, 05:42 PM
RE: Trade feature - by seungwoo.kang - 08-12-2016, 04:10 PM

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