When connecting a demo board using the standalone iMPACT tool, the USB cable is detected. However, when invoking the tool from Active-HDL, the cable is not detected. How can I fix this?
Xilinx iMPACT is a 64-bit only tool. In Active-HDL, you need to point to the 64-bit Xilinx ISE, otherwise the 32-bit version will open by default.
Go to Tools | Preferences.
Under Environment, expand the Flows option and select Integrated Tools
In the location field, check and verify that the path is pointed to the 64-bit version (nt64).