Maybe this link could help understand the issue:
https://mailman.research.att.com/pipermail/graphviz-
interest/2010q1/006880.html
** Changed in: openobject-server
Assignee: (unassigned) => OpenERP's Framework R&D (openerp-dev-framework)
--
Complex workflow for procurement causes pydot error
https://bugs.launchpad.net/bugs/405962
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Status in OpenObject Server: Confirmed
Status in OpenObject Server 5.0 series: Invalid
Bug description:
I'm running OpenERP version 5.0.1 on Ubuntu 8.10.
I select a procurement order in the desktop client and from the Plugins menu, I
choose Execute a plugin. I double click Print Workflow (Complex). I quickly get
a blank page. When I check the server output, I see this:
[2009-07-28 11:59:01,045] [31m[49mERROR[0m:workflow:[01]: Exception in call:
Traceback (most recent call last):
[2009-07-28 11:59:01,047] [31m[49mERROR[0m:workflow:[02]: File
"/home/don/workspace/openerp-server-5.0.1/addons/base/ir/workflow/print_instance.py",
line 150, in __init__
[2009-07-28 11:59:01,047] [31m[49mERROR[0m:workflow:[03]: ps_string =
graph.create(prog='dot', format='ps')
[2009-07-28 11:59:01,047] [31m[49mERROR[0m:workflow:[04]: File
"/var/lib/python-support/python2.5/pydot.py", line 1796, in create
[2009-07-28 11:59:01,048] [31m[49mERROR[0m:workflow:[05]: status,
stderr_output) )
[2009-07-28 11:59:01,048] [31m[49mERROR[0m:workflow:[06]:
InvocationException: Program terminated with status: -6. stderr follows: dot:
mincross.c:835: install_in_rank: Assertion `(g)->u.rank[r].n <=
(g)->u.rank[r].an' failed.
I've tried several procurement orders in different states, and they all cause
the same error. I've tried the basic Print Workflow, and it works. I've tried
the complex workflow on a production order, and it works.
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