Hi, When modifying the linker script to adjust the location of RAM, it is easy to forget to change the size of the heap in the eCos memory layout file. This value is being passed to the memory allocator. If the size if negative, the dlmalloc doesn't complain. The attached patch checks the size on an assert. Regards, Edgar -- Edgar Grimberg System Developer Zylin AS ZY1000 JTAG Debugger http://www.zylin.com/zy1000.html Phone: (+47) 51 63 25 00