Appreciate any help in resolving/understanding following error. Very occasionally get following error. The error occurs once every 20 - 30 days. OS HP-UX 11.11 applicationCode.py is invoked via a cgi wrapper by apache httpd . ############### ERROR LISTNG ############################# sem_init: Device busy Traceback (most recent call last): File "applicationCode.py", line 4, in <module> import cgi File "local/lib/python2.7/cgi.py", line 51, in <module> import mimetools File "local/lib/python2.7/SECURITY WARNING!! import tempfile File "local/lib/python2.7/tempfile.py", line 83, in <module> once_lock = _allocate_lock() thread.error: can't allocate lock ##### END OF ERROR LISTING ################## applicationCode.py has line of form = cgi.FieldStorage() Thanks Shal -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-list/attachments/20140614/ad5e8424/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: mimetools.py Type: application/octet-stream Size: 7418 bytes Desc: mimetools.py URL: <http://mail.python.org/pipermail/python-list/attachments/20140614/ad5e8424/attachment.obj> -------------- next part -------------- A non-text attachment was scrubbed... Name: tempfile.py Type: application/octet-stream Size: 18674 bytes Desc: tempfile.py URL: <http://mail.python.org/pipermail/python-list/attachments/20140614/ad5e8424/attachment-0001.obj> -------------- next part -------------- A non-text attachment was scrubbed... Name: cgi.py Type: application/octet-stream Size: 34505 bytes Desc: cgi.py URL: <http://mail.python.org/pipermail/python-list/attachments/20140614/ad5e8424/attachment-0002.obj>