"your system out of memory" & importing from excel problem

Hi,

i try to import excel file for resources but i recive a message "your system is out of memory, please close other running application and try this operation again" although there is no other application is runing and although i did the same operation many times previously. i splitted the excel file many times till the degree i made ten rows only in one file to see if this will help or not, but i surprised that i recived the same meesage. i uninstalled also my antivirus but also no effect. are there any help?? i confirm again i did the same operation many times previously without any problems??

i use P6V7

Thanks