Traceback (most recent call last):


 "/home/sarah/sphinxProject/env/lib64/python3.6/site-packages/rst2pdf/pdfbuilder.py", line 141, in write

appendices=opts.get('pdf_appendices', self.config.pdf_appendices) or [])


 "/home/sarah/sphinxProject/env/lib64/python3.6/site-packages/rst2pdf/pdfbuilder.py", line 218, in assemble_doctree

self.env.indexentries={}
AttributeError: can't set attribute

WARNING:
Unknown error initiating TCP/IP socket to 32vd:36993 (http://32vd:33177/): Traceback (most recent call last):


 "/opt/ros/melodic/lib/python2.7/dist-packages/rospy/impl/tcpros_base.py", line 558, in connect

self.read_header()


 "/opt/ros/melodic/lib/python2.7/dist-packages/rospy/impl/tcpros_base.py", line 653, in read_header

self._validate_header(read_ros_handshake_header(sock, self.read_buff, self.protocol.buff_size))
AttributeError: 'NoneType' object has no attribute 'buff_size'
