I have also experienced this.

Have you tried pressing second mouse button?

Are you sure you didn't pressed the walk key (shift) twice ?
Try to press it again twice to unlock the walking command. (can be use with most keys of the game)

The Optics button which, by default is bound to Sec Mouse Btn causes you to walk to keep your aim steady when aiming a gun.
Sadly it also does the same even if you don't have a weapon.
Also, try Spacebar which toggles between a raised or lowered weapon (works with flashlight as well)

Only experience when tapping right mouse button which appears to be by design as it happens in Arma 2 and 3 also.

I got stuck in a walk and only managed to fix it by climbing a ladder. Playing with the raise weapon key and optics didn't solve it. Whatever happened isn't very repeatable.

Guyver1 gives the best cause/solution to this. I haven't seen this issue occur beyond the Second Mouse Button / Space Bar / Double Shift toggling. If are stuck in walk mode, it is a combination, or one of these.

Please verify and Edit as necessary.

I've tried toggling shift and using the spacebar. Idk about the second mouse button but I'll try it next time

I have the same problem of not being able to change pace at times. It seems to get stuck sometimes after raising/lowering/switching a weapon, but I'm not positive.

If you press your aim button while you don't have a rifle / pistol in your hand, it will make you walk as if you are looking down iron sights even though they arn't there. Some thing in ArmA. Try right clicking, then double tapping shift, if it doesn't work, try in the other order.

I thought this was a bug at first too... it is just confusing. Either you have walking on by double hitting shift, or you clicked the right mouse button (not holding it to zoom, just a short click) which acts like you have a rifle raised (ie moving slowly). Whenever this happens now I can get back to running fairly easily. I would say the issue is resolved?

Double-tapping shift sometimes fixes this. Double-tap of shift is a toggle to permanently be either in walk or sprinting mode. This may untoggle it if this is the problem.

Also make sure that you haven't double-tapped 'Q' or 'E' as they toggle lean.

I've found that pressing Enter fixes this for whatever reason.

I had the same thing in Arma 2. Get rid of this remnant of a bug please :P

do you play in 3rd person? i figured that if i switch into 1st person and then toggle between walking and running it would work again.

Try to press numpad "0"

MrPink52 is right, RMB click solved this for me all the time today

I had this problem but i just needed to right click and i'm running again.

Simply right click, I do it all the time. Hope it works

/Edit

Please read my new post below.

STOP your aggro))

There's just a little thing you should know:

LIKE IN ARMA II WHEN YOU AIMING WITH RIGHT-CLICK EVEN WITHOUT WEAPON IN YOUR HANDS YOU BECAME WALKER!!! :D

Try to run and aim in one time at real life and you will understand why:

"Sometimes I randomly get stuck in walk mode."©
                                                     Sandman

Ok I have been playing around with this and every time I go it to opitics mode then unequipt it without going out of optics mode I get this to happen. I just re-equip my weapon an exit out of optics mode and can now run.

Even if this is caused by right mouse button this should not happen when you have empty hands, you don't aim your empty hands.

A lot of people are adding notes about spacebar and right-mouse button to solve this issue, saying it isn't a bug.

It is a bug, I've experienced it. No amount of toggling right mouse button or spacebar works. The numpad enter key to change perspective is also tied to this somehow (ever had to tap it twice to change the view?).

Double tap "Shift" also toggles walk on/off

As I already wrote above:
«It's in your local keybindings section, where you can actually REMOVE the toggle function.
Simply edit your Keybindings, remove the walk toggle function and get used to the other movement/toggle mechanics of the game.»

Check ALL of your "2x" keybindings and maybe delete them, to get rid of all possible "double tap to toggle function" mechanics for all movements (includes Q & E for leaning).

To the developers:
A solution would be, to remove the default keybinds for toggling walk mode from the config by default and also disable the "right klick walk mode" when no weapon is equipped/player is not in view "scope".

Greez KiloSwiss

I am experiencing this as well. I have tried every key combination with no success.

It's not about key combinations, it's the ability to double tap a key to toggle a function.

Examples:
2x Left Alt = Freelook mode toggled ON
2x Left Shift = Walk mode toggled ON/OFF
etc.

TO OP Sandman and GaryDave:

Read GaryDave's post, this worked for me!

"A lot of people are adding notes about spacebar and right-mouse button to solve this issue, saying it isn't a bug.

It is a bug, I've experienced it. No amount of toggling right mouse button or spacebar works. The numpad enter key to change perspective is also tied to this somehow (ever had to tap it twice to change the view?). "

This has happened to me once... The game would let me sprint by double tapping W, but by default I was not allowed to "jog". Single tapping left shift and double tapping left shift didn't fix the issue. Also I had tried swapping items/weapons, aiming and bringing down aiming via space bar. With no items in hand and my 'ready' stance toggled off, it didn't change. Second mouse button didn't fix issue either. Was literally stuck in walk mode standing up. But yes I could still sprint and squat walk. But no normal jog. Happened to me around Stary Sober yesterday. Fixed by disconnecting and reconnecting to server

I usually fix this by re-equiping my weapon then lowering it, before putting it away again.

I have a method for this even though I'm not sure if it works 100% of the time. Might not help much in diagnosing the bug but at least it makes it less of a bother for as long as it's around.

1. Try right clicking
2. If 1) doesn't work, press Space and try again
3. If 2) doesn't work, double tap shift
4. If 3) doesn't work, start from the beginning

I'm not sure if steps 3 or 4 work since since 1 and 2 have worked in their current form 100% of the time for me (about 5 times maybe) but I think they're worth a try.

Happens to me all the time that "shift breaks". I get stuck walking, and no amount of pressing shift or double pressing shift will bring back my default running state.

I can still break into a sprint by double tapping W, but otherwise I'm stuck walking.

right click once and you should start to run again. That's what i've found works.

Same here.
Fixed it once by going prone, then standing up again.
There is obviously something happening that the Player can't see. Maybe a type of view switched on or something.

Needs addressed so the Player can turn that switch off and start running again.

Hey,

if you get stuck in walking animation, try to double tap the shift key or pressing the right mouse button.