![55.ERROR:Place:1136 - This design contains a global buffer instance…… non-clock load pins off chip - geekite - 博客园 55.ERROR:Place:1136 - This design contains a global buffer instance…… non-clock load pins off chip - geekite - 博客园](https://images2015.cnblogs.com/blog/665244/201601/665244-20160116142302553-530577877.png)
55.ERROR:Place:1136 - This design contains a global buffer instance…… non-clock load pins off chip - geekite - 博客园
DRC RTRES-1] Backbone resources: 1 net(s) have CLOCK_DEDICATED_ROUTE set to BACKBONE but do not use backbone resources
![Prototyping with FPGAs - Part 4 - Combinational Logic vs. Sequential Logic with Vivado on Artix-7 FPGA - Blog - Digital Fever - element14 Community Prototyping with FPGAs - Part 4 - Combinational Logic vs. Sequential Logic with Vivado on Artix-7 FPGA - Blog - Digital Fever - element14 Community](https://community.element14.com/resized-image/__size/643x585/__key/communityserver-blogs-components-weblogfiles/00-00-00-02-85/3582.contentimage_5F00_198708.png)
Prototyping with FPGAs - Part 4 - Combinational Logic vs. Sequential Logic with Vivado on Artix-7 FPGA - Blog - Digital Fever - element14 Community
![Place 30-574] Poor placement for routing between an I/O pin and BUFG - EE2026 Design Project - Wiki.nus Place 30-574] Poor placement for routing between an I/O pin and BUFG - EE2026 Design Project - Wiki.nus](https://wiki.nus.edu.sg/download/attachments/167808307/30-574.png?version=1&modificationDate=1475408860220&api=v2)