Traceback (most recent call last):
File "/opt/openfpga/vtr/bin/python/create_ioplace.py", line 151, in <module>
main()
File "/opt/openfpga/vtr/bin/python/create_ioplace.py", line 115, in main
pcf_constraint.net
File "/opt/openfpga/vtr/bin/python/vpr_io_place.py", line 100, in get_top_level_block_instance_for_net
return self.block_to_inst[list(block_name)[0]]
UnboundLocalError: local variable 'block_name' referenced before assignment