If attempting to create a simple design in the PlanAhead tool using two MicroBlaze cores, the following error is received:
[PhysDesignRules 1683] Unsupported programming for BSCAN block and JTAG_CHAIN attribute value 1. The BSCAN component MB_One_i/debug_module/debug_module/Use_Virtex6.BSCAN_VIRTEX6_I has placement which requires the JTAG_CHAIN attribute to be set to the value 2. The JTAG_CHAIN attribute must be changed or the programming for the BSCAN block must be moved to a location corresponding to the JTAG_CHAIN attribute setting.
This error occurs because both MicroBlaze MDM modules have the same JTAG_CHAIN parameter. Both MDM modules cannot be located in the same position on JTAG.
The fix this issue, perform the following: