Pkg_resources.DistributionNotFound: reportlab

[游客]

[root@localhost ~]# openerp-server start
Traceback (most recent call last):
  File "/usr/local/bin/openerp-server", line 4, in <module>
    import pkg_resources
  File "/usr/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 2603, in <module>
  File "/usr/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 666, in require
  File "/usr/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 565, in resolve
pkg_resources.DistributionNotFound: reportlab


这是缺什么？高人看一下