Nios II eclipse help!!

Hello everyone,

I use Quartus 11.In eclipse,when tried to build,i got one strange error which i am not able to understand.

My qsys generation successful as well as the quartus compilation,and in eclipse "hello world" program also ran successfully.But when tried to write my own code in nios without any error.I got the following error

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address 0x1b5c8 of epcs_qsys.elf section `.bss' is not within region

address 0x1b5c8 of epcs_qsys.elf section `.onchip_ram' is not within region

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It is saying something about the "epcs" which i used but i am not able to understand.

My programming memory is "on-chip" which is the only memory in my system.

Kindly tell me possible solutions for this.