Hi, On upgrading from analysis 1.0.13 to 1.0.14 I stopped keeping my distros in /usr/local/ccpnmr<version number> and linking to /usr/local/ccpnmr and just moved the 1.0.13 installation to /usr/local/ccpnmr prior to the upgrade. Interestingly after the upgrade I could tell that old .pyo files were being picked up because I was getting paths like: File "/usr/local/ccpnmr1.0.13/temporaryReleaseDir/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/WindowBasic.py" in my tracebacks. I dealt with this by deleting all the .pyo files and running analysis as root to create new ones - but why were the old .pyo files from the temporaryReleaseDir being picked up at all? -- Dr. Brian O. Smith ---------------------- B Smith at bio gla ac uk Division of Biochemistry & Molecular Biology, Institute Biomedical & Life Sciences, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK. Tel: 0141 330 5167/6459/3089 Fax: 0141 330 8640