How to make a range gun available only in berserk

I am making a shotgun that shoots blasts of hellfire,but i want it to be available only in berserk mode(need berserk power to get the weapon ready,even if it is picked up).When i put the jumpifinventory actor function to make the gun ready only if the player has berserk power and because of that,an error named "sprite names must be exactly 4".I have 2 sprites for the ready animation.How to fix that?

Post your code so we can see what's wrong.

i wanted in the spawn state to be a_jumpifinventory("Powerstrenght",1,"Ready"),but it gave me that error and i deleted it

Post the erroneous code. I don't see any A_JumpIfInventory calls there.

CaptainManiac wrote: i wanted in the spawn state to be a_jumpifinventory("Powerstrenght",1,"Ready"),but it gave me that error and i deleted it

That could be a problem right there. "Spawn" is the state in which the item exists in the game world to be picked up. At this point, the item isn't in the player's inventory, so checking the player's inventory for "PowerStrength" at that time wouldn't be meaningful--it'll never find it. You also misspelled "PowerStrength" in the excerpt above, which could also give you trouble if the misspelling was also in the original code. What you probably want to do is put the A_JumpIfInventory into the "Ready" state itself, and then make a similar state ("Berserk"? "Powered"?) that contains the weapon attack and readiness check. Something like so:

Bear in mind that I haven't tested this to see if it's airtight, but it gets the general point across.

Then i need to repair my sprites for ready or at least to put it in the powered mode,cus i put flame things on the ready animation to indicate that the weapon is active.YOU WILL SEE MY CRAP NOW.I CAN'T DRAW CORRECTLY AND BECAUSE OF THAT WEAPON WILL BE SIMILAR TO A JOKE WEAPON THAN LIKE A SAWED-OFF HELLISH SHOTGUN THAT FIREC CUSTOM SHOOTABLE BLASTS OF HELLFIRE.LOOK
PS:Sorry for the late reply,but yesterday was evening in my region and i was made to go to bed and today there was a work to do.

Thanks you