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Pistons staying extended

piston bug

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3 replies to this topic

#1

Namfuak
    Namfuak

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Posted 31 March 2012 - 01:30 AM

I have been building an elevator in 1.2.4 creative, and have noticed that, despite having no power, sticky pistons will stay extended.  It is not an issue of design, because in order to make them retract a blcok has to be updated near them (usually I reset it by destroying and replacing a piece of redstone wire, or changing the tick value on a repeater).  It appears that the block updated has to be within about 3 blocks.  Anyway, the other strange thing is that if you give them power, they will retract and then extend again - presumably the state change causes them to "remember" to retract, and then the fact that they are powered causes them to extend again.  I wish I could elaborate more, but I have not been able to replicate the bug in any other test - using a repeater, rapidly turning it on and off, surrounding it with blocks, none of these things recreate the issue.  Also, when I run the elevator, different pistons have this glitch, even though their design is the same - in fact, almost any piston might get this bug one time, and then not get it the next.  Anyway, here is a picture.

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#2

SuperCrafters

Posted 02 April 2012 - 11:22 PM

Yes I have been having the same problem. It happens on my server. But on my friends server it does not. I don't know how to fix this at all.

#3

TNTQc
    TNTQc

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Posted 02 April 2012 - 11:43 PM

I also had this problem. Actually, my first problem was that my simple clock systems (flicks on/off) didn't work on reloading my world. I found a way on youtube; someone resolved this with minecart system and pistons. (I have a thread expalining my first issue: http://www.minecraft...__fromsearch__1) And the solution with pistons: http://www.youtube.c...h?v=_XEmHHT6tTc
This won't probably fit on your system (or design). Just let you know.

* Also, on the Minecraft wiki, they explain the "pistons won't retract" bug with a linked video.
Here's the link: http://www.minecraft...net/wiki/Piston (2nd point of the bugs section (bottom of page) with a linked video (#10)).
It seems that the pistons won't retract if there is a powered block on its diagonal. For me, If I wait a couple of minutes, close to my system, the pistons restart to work again (sometimes, it take a while (2-3 minutes!!). I have to say that i'm currently playing MC1.2.3.
I highly hope that they fix that bug, cos' it's disturbing redstone mechanisms.
Hope this could help you find a way to your issue. Posted Image

#4

Namfuak
    Namfuak

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Posted 06 April 2012 - 04:00 AM

View PostTNTQc, on 02 April 2012 - 11:43 PM, said:

I also had this problem. Actually, my first problem was that my simple clock systems (flicks on/off) didn't work on reloading my world. I found a way on youtube; someone resolved this with minecart system and pistons. (I have a thread expalining my first issue: http://www.minecraft...__fromsearch__1) And the solution with pistons: http://www.youtube.c...h?v=_XEmHHT6tTc This won't probably fit on your system (or design). Just let you know. * Also, on the Minecraft wiki, they explain the "pistons won't retract" bug with a linked video. Here's the link: http://www.minecraft...net/wiki/Piston (2nd point of the bugs section (bottom of page) with a linked video (#10)). It seems that the pistons won't retract if there is a powered block on its diagonal. For me, If I wait a couple of minutes, close to my system, the pistons restart to work again (sometimes, it take a while (2-3 minutes!!). I have to say that i'm currently playing MC1.2.3. I highly hope that they fix that bug, cos' it's disturbing redstone mechanisms. Hope this could help you find a way to your issue. Posted Image

Thanks for this tip.  It looks like this might be caused by the diagonal thing, since the redstone is powering the blocks beneath it that are also up and diagonal to the pistons.  I have found a workaround, though it costs more redstone (putting some extra repeaters in so that one turns off 4 ticks after the piston, so it updates the piston near them).  Presumably since this hasn't been fixed since 1.7.3 it won't be fixed anytime soon.