AI's refusal to move is unjustifiable and unacceptable.

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Chippings

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Synopsis
France doesn't move its army in a call to war. It acts with neither aggression nor self-interest. Rather, it exhibits a complete lack of function over several months of game time and several full game-exit reloads.

Context
Playing as Silesia for the "Back to the Piast" achievement. Poland and Lithuania have done well, formed Commonwealth and beyond. Opportunity finally arose to knock them down with the help of France, who I have been allied with, and who have rivaled Commonwealth for decades.

Evidence
2016-01-10_00001.jpg

2016-01-10_00002.jpg

Recount
The first picture is of Mainz, who once upon a time was in the war and who I thought France would just quickly take care of. I found that I had to siege them down myself and peace them out to prevent them from taking Paris, which I assumed would push France towards leaving the war. Note the progress through two of France's forts during this time. This was when I was still thinking I could get France to move through Ferrara and Venice to participate in the war. Several full exit game reloads occurred during this period.

Later more of my country was sieged down leaving me no access to the south so I thought to get more military access through Brunswick, Cologne, and The Palatinate. France still didn't take the bait, despite several more full exit reloads. Commonwealth did, though, and came in to finish the siege of Paris that Mainz started. When the siege of France's Capital, Paris, completed, with no sign of life from the French army, I decided to take the final screenshot of the French army and their ridiculous attrition before putting the game behind me and moving on.

Apologies for some lack of visual evidence, but note that months have passed from the first to the second screenshot and the French army remains in the same province. Also it may be useful to know that French trust of me was 85, opinion at +200, and this was the only war they were in.

Analysis
In the past, I was able to either solve this problem through reloading, or accept the possibility that the AI was playing the meta-game of defensive non-participation. However, in this case I was able to demonstrate an AI which demonstrated neither expected behavior nor high-level self-interest.

France isn't doing what a casual player would expect: helping in the war. France isn't doing what a meta AI or human player MIGHT do: station armies defensively in home country to (hopefully) avoid participation. France is simply non-functional: sitting in a single province with their entire army, allowing their forts and even capital to be taken, while draining manpower out the nose through self-attrition.

Conclusion
Evidence and discussion focused on the existence of instances where EUIV AI ceases to act. I trust that many players have experienced events such as these themselves. These occurrences should be acknowledged. This sort of "behavior" -- lack thereof -- from the AI prevents Europa Universalis from functioning as a game, and is unacceptable.
 
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Rudolph

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Noticed this behavior if the AI nation gets sieged in a lot of provinces at the same time, but a reload usually fixes it after the war is over. Did something similar occur here or was it just Mainz?
 

zyphial

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Sometimes, sometimes you can make it react to a province objective, but yes I have seen this.
 

Oldpara

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I beleive that the reason of this behaviour is more simply and less cunning than you might think:

1. France didn't had access to enemy territory at start of war
2. France decided to transport the troops using transport ships (like to Gdansk or something maybe)
3. France don't have enough ships to transport whole army at once
4. Chosen target is FAAAR away so it takes time to travel there, not to mention month or so to land the troops
5. Whole army is locked for duration of transport procedure which - taking number of troops and distance to consideration - may take like several months if not years.

So now you need to wait this time to unlock the army or pray for the French transports to be destroyed which is unlikely to achive by PLC navy.

Those are my suspicions regarding this situation.

Edit: I see 15 French ships near Bremen. Check if they are loaded. If so my suspicions are ture. And with 15 ships this army will be locked like 5 years, lol :) But there is a chance that PLC will destroy the desant unlocking French army :)
 
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Chaingun

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Standard solution to actually have this solved: Upload save file with this happening so we can fix it. If it can't be captured with a save file or other steps to reproduce, it's more complicated of course.

When it comes to "AI isn't moving" there are a myriad of possible causes, and it's rarely possible to guess the reason accurately without the bug happening in the game while the debugger is running.
 
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DukeofSerbia

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DukeofSerbia

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Maybe the AI in this case deems an attack over the river as to risky. Maybe the English general ist better than the Austrian?
No. It's stuck bug. English army was initially 10k without general. Only once they started to besiege Breda, another 20k army arrived so Austria had enough time to kill first 10k.

Majority of time simple reload solve it. Once I reloaded Austrian army started to move to Zeeland and after liberating they attacked English army in Breda.

I saw this bug many times. Aa far as I observed it's mostly problem with defending AI because they always wait morale to go max before moving but for some reason their armies bug even after moral is maxed.
 
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paulatreides0

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Well, I can say that this isn't a solitary happening. I played a game as Poland a while back where I was in a war where Lithuania refused to move any troops, leaving me with just the Polish troops, which quickly got overrun and slaughtered. And I mean they didn't even leave their own territory.
 
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semaphore

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I have seen this as well in an Austrian game when my Bohemian PU subject (and their Silesian vassal) picniced in Prague for years while I had to fight a war against Bavaria.

But I do agree they need a save file, not just forum posts and screenshots. I at least have not been able to reproduce it.
 

fleetothemoon

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Curiously, have you been playing the game without steam?

The AI has been known to be 'lazy' in the past when the game was played without steam... not building armies, and not mobilizing their troops. This was supposed to have been fixed several versions ago though, so what I say here may not necessarily be the issue, but it's worth knowing =)