fatal error - cygheap base mismatch detected ... cygwin1.dll...NiosII/Eclipse problem

I'm trying to build and run a simple NiosII system on my DE2-115 board. I'm using Quartus II 64-bit version 14.0.0 Build 200 06/17/2014 SJ Full Version, and the corresponding Qsys and Nios II Softw...