Trouble with GP4 Master 1.2

Hello!
I tried to unpack my cars.wad in order to update it tonight, and here is the error message I got

EXACT ERROR MESSAGE:
I/O error 131

ERROR ADDRESS (DEZ / HEX):
5095717 / 0x004DC125

ERROR ADDRESS - BASE (DEZ / HEX):
897317 / 0x000DB125

APPLICATION VERSION:
1,0

APPLICATION PATH:
C:\gp4utils\gp4master12\

FILENAME:
GP4WAD

FUNCTION:
TWADFile.ExtractAll

LINE NUMBER:
319
ForceDirectories(ExtractFilePath(Dir + FEntries.Name));


What happened? What can I do to sort it out?
Thanks!

Anything?

Really don't know, but I suggest you not to you GP4Master anymore. It's quite old now and some new and better tools are available. Try using EasyWAD from ZaZ Tools Pack instead, it allows you to see the wad files as in Windows Explorer!

Thanks!