ii)With optimization disabled modelsim is also reporting "Memory allocation failure".
iii)Modelsim was also run independently to conserve memory. In this case also the result is same.
Note:->The system configuration is:OS: XP Pro x64, Service Pack 2
System: Intel Core 2 Duo E8400 @ 3GHz
Ram: 7.92 GB
I had attached synthesis report and Modelsim Transcript. I am not able to find the solution ,whether I have to change my setting of ISE(P&R or any where else) or any change in modelsim.ini.Please suggest me......thanks in advance.