Cyclone V Development kit with MATLAB HDL Coder

[Altera_Forum]

Hello, 

 I have been trying to program my Cyclone V board for a basic LED blinking example using a MATLAB example as explained in this link (http://de.mathworks.com/help/hdlcoder/examples/getting-started-with-hardware-software-codesign-workflow-for-altera-soc-platform.html).   - My MATLAB version is R2015a with valid toolboxes. - My Quartus version is 15.0 (Both runon 64 bit windows7) - I have also installed USB Blaster and UART drivers. I have also connected the board with ethernet cable using serial port communication.   One important thing is, all of these run on a virtual machine (both host and guest are windows 7 64 bit).  Now I have two questions.  First, I cannot successfully complete the example. According to the link, when I go thru step 4.1 (i.e. to create a project on Quartus), I get this error message. I don't understand the reason behind this.   Second question is that, the USB connection of the board on the virtual machine keeps connecting and disconnecting. It is not at all stable. I have filtered these connections when i configured my virtual machine and I also made sure, the board is disconnected from the host OS.   Any help would be appreciated.  UPDATE: I solved the unstable USB connection. I had Quartus and its drivers installed on the host OS and this seems to have been the conflict. Then I uninstalled everything related to Quartus from the host and now the the board is connected to the guest OS without any issues.