We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 24368

11.1 Partitions - "ERROR:MapLib:721 - This design contains TBUFs that cannot be transformed..."


I have added Partitions to my design and now, when I run MAP, I receive the following errors:

"ERROR:MapLib:721 - This design contains TBUFs that cannot be transformed into logic. TBUFs are not supported in this architecture. Please refer to Answer

Record 20048 for more information. TBUF instances not transformed: bfm_glue_2/dspbus_rd_5_t_0[15], DSPsupport/mainregs_ins/dsp_rd_data_7[15],"

These errors were not present without Partitions. Why do Partitions cause my TBUFs to not be transformed? How can I use Partitions with TBUFs?


When TBUFs in multiple Partitions drive the same signal, synthesis is not able to transform them into logic. To prevent this error, create Partitions such that all TBUFs that drive a signal are in the same Partition.

AR# 24368
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article