how do i know if doom2.wad is acting weird

i'm missing sprite lumps on doom2.wad i wonder why.. i everytime i open doom builder i get this error



wtf i didn't do anything to this to happen. can anyone tell me what's wrong??

Did you edit your doom2.wad file before? It might be corrupted...

Use Hash Calculator and compare your file again the known doom2.wad hashes.

If it is corrupted, you'll have to go back to your original media (CD, Steam, GOG.com, etc...) and copy the uncorrupted file back out.

It would probably be easier to just redownload/install doom2 from where you got it originally (steam, disc, etc)

PISTA0 is a ZDoom-exclusive pistol pickup sprite. It is not in Doom2.wad and not supposed to be there. It is in ZDoom.pk3.

Just got the exact same error after i updated the GZDoomBuilder copy i've got, so that's the reason .

Your wad is fine -- the (GZ)Doom Builder configuration you're using has a reference to a zdoom.pk3 resource. I suspect it's GZDoom Builder since it expects you to load zdoom.pk3 as a resource when using Hexen or UDMF map formats. Might be an editor oversight if you're using a vanilla or Boom config.