specific load of trains

[Chuflo]

[translated message]
Good Morning.
For a few weeks I have returned to meet the wonderful TT! (openttd)
It's been like going back to the old days of high school!
I have a doubt that I can not solve while surfing the net (maybe my minimum command of English influences).
It is as follows: it is possible in Openttd
order a train to load only one type of specific resource in a station?
I observe the option "full load of any resource", which is the most similar to what I'm looking for, but with it you can not point to a particular resource.
The order that I would look for would be "load if this specific resource is available, and not load the remaining available resources accepted by this train".
That is all.
Greetings from the summer.

Ch.

[vrn]

JGR's Patchpack has a "load/unload by cargo type" option.

[Chuflo]

[translated message]
Thank you very much for the reply!
The JGR pack is awesome!
Unfortunately, it's out of my way (I hope only for the moment); I have been reading for several hours in forums, in the openttd wiki, and in Google, and I have tried it three or four times in the terminal (Kubuntu 18.04), but I am too clumsy!
Although follow the steps of any tutorial, intermediate issues appear that I do not get to decipher.
Thanks also for the great work of this forum.

Ch.