Cargo required and not available

Click  in your left column on the blue arrows to switch between your order places.

That is true. Been there done that. Sometimes the orders are different and sometimes they are the same. This does not explain why the desired cargo is not in the selection/load boxes. E.g. the requested cargo in the challenge id planks the selection shows 3 items 12 plastics, 0 coconuts and 5 electric components but no planks even though planks are in the inventory. The choice is to ship what is there or let the challenge expire. 

From your screen shot, it appears that the challenge has expired. Go to the train HQ, select that challenge and click Not Now, a new challenge will appear.

Yeah that’s a bad screen shot. Can I request a new challenge if it has not yet expired? I do not have planks to load. 

You had the wrong wagon selected, you had need the construction wagon instead the materials wagon and than the planks would have been appeared 

Thanks I was not aware of the difference. I’ll look more closely. I appreciate your reply’s.