Error Opening in Installation Master

Hi 

I got following error while opening SAP Installation master in AIX.

Error: 

iaextract.c :440: error opening archive file /oracle/ZIM/IM_AIX_PPC64/ ./sapinst

Resolution  : 

Intially i have uploaded uncarred Installation Master files through FTP client and got above error. Again i have uploaded zip file to server and unzipped on server using command "unzip filename". Again i run installation master ./sapinst. Its worked and able to installation master.