I got this error, when starting the Zope server again. I have had this problem before, then I found out there was another processing I did not kill still running the server. this time, I made sure I had no other processes that are running the server or making use of any files in Zope. Please help!

File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/z2.py, line 582, in ?
File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/__init__.py, line 46, in startup
(Object: startup)
File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/Zope/App/startup.py, line 51, in startup
File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/FileStorage.py, line 226, in __init__
File /home/xxx/xxx/Zope-2.6.1/Zope-2.6.1-solaris-2.8-sparc/lib/python/ZODB/lock_file.py, line 33, in lock_file

StorageSystemError: Could not lock the database file. There must be
another process that has opened the file.