I'm getting an error "Operation would block" at CafePlus 8 and 9 version. How do I resolve?

 This problem may occur in the first version of CafePlus 8 and CafePlus 9 programs. Main source of the problem between server and the client exchange files system. Both specified in the header and firewall and anti virus programs cause problems with the file exchange system has been changed. To resolve this error you need to install the latest version of your CafePlus 9 in your cafe.