[求助] Error: Can't fit design in device啥问题

Error: Can't fit design in device
Error: Can't place all RAM cells in design
        Info: Selected device has 26 memory locations of type M4K. The current design requires 48 memory locations of type M4K to successfully fit.
        Info: Memory usage required for the design in the current device: 185% M4K memory block locations required
Error: Quartus II Fitter was unsuccessful. 2 errors, 2 warnings
        Error: Peak virtual memory: 186 megabytes
        Error: Processing ended: Mon Sep 06 13:01:56 2010
        Error: Elapsed time: 00:00:04
        Error: Total CPU time (on all processors): 00:00:03
这是哪里出现问题了啊
什么解决啊