BeMicroSDK debug core dump in Nios2 Software Build Tool for Eclipse

Hello,

Tried to run the simplest of all tutorial program - HelloWorld in Nios2 Software Build Tool for Eclipse 10.1, the following error message is displayed not long after the debugger started:

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Pausing target processor: not responding.

Resetting and trying again: OK

Reading System ID at address 0x080002A8: verified

Listening on port 1491 for connection from GDB: 59saccepted

assertion "m_state == state_debug" failed: file "nios2oci.cpp", line 158

/cygdrive/c/altera/10.1/nios2eds/bin/nios2-download: line 601: 9536 aborted (core dumped) nios2-gdb-server --cable 'usb-blaster on localhost [usb-0]' --device 1 --instance 0 --sidp 0x80002a8 --id 0x6060d7d5 --timestamp 1287701530 --tcpport auto --write-pid ./nios2-download.pid

After two weeks there is not single one program I can run successfully with BeMicroSDK. Any help will be much appreciated. Thank you in advance.