The error "overflow" is probably due to a too big range of data to process. The early time visual basic version I used then doesnt probably allow more than 256 items to be used (unzipped) at the same time. But as I said, I don't support this program anymore. I'm not going to generate 10000 zip to test it.

 

• Use pkunzip form command prompt. You can find it on www.pkware.com  . It's shareware, but the command line version won't nag you. The command should be something like "pkunzip abc*.zip C:\dest"
• Use winrar. Winrar allows multiple unzipping too. All you have to do is select all the files from the winrar shell and press extract.
• Take the sourcecode, compile it using a recent visual basic compiler. Get the latest zip dll from infozip.