Pin assignment for Flash and SDRAM of DE2-70

After compiling and downloading to FPGA, I'd run NIOS II and got this error. How can I fix this error?

--- Quote Start ---

**** Build of configuration Release for project Homwork ****

make -s all includes

1 [main] ? (6404) c:\altera\90\quartus\bin\cygwin\bin\sh.exe: *** fatal error - couldn't allocate heap, Win32 error 487, base 0x680000, top 0x690000, reserve_size 61440, allocsize 65536, page_const 4096

0 [main] sh 3916 fork: child -1 - died waiting for longjmp before initialization, retry 0, exit code 0x100, errno 11

/bin/sh: fork: Resource temporarily unavailable

/bin/sh: /cygdrive/c/altera/90/nios2eds: is a directory

cygpath: can't convert empty path

/cygdrive/c/altera/90/nios2eds/components/altera_hal/build/system_rules.mk:120: /components/altera_hal/build/gnu_rules.mk: No such file or directory

/cygdrive/c/altera/90/nios2eds/components/altera_hal/build/system_rules.mk:124: /components/altera_hal/build/gtf_rules.mk: No such file or directory

make[1]: *** No rule to make target `/components/altera_hal/build/gtf_rules.mk'. Stop.

make: *** [system_project] Error 2

Build completed in 5.478 seconds

--- Quote End ---