Hi Bjoern & Greg, The Biopython package looks OK on the test tool shed, http://testtoolshed.g2.bx.psu.edu/view/biopython/package_biopython_1_61 This includes the lines: <package name="numpy" version="1.7.1"> <repository changeset_revision="ad6ebe2c75ef" name="package_numpy_1_7" owner="bgruening" prior_installation_required="True" toolshed="http://testtoolshed.g2.bx.psu.edu" /> </package> <package name="matplotlib" version="1.2.1"> <repository changeset_revision="c888aa8ed318" name="package_matplotlib_1_2" owner="bgruening" prior_installation_required="True" toolshed="http://testtoolshed.g2.bx.psu.edu" /> </package> Note that we plan to update those dependencies to point at the IUC account, not Bjoern's personal account. However, on the main Tool Shed something is broken with the dependencies lacking relevant revisions: http://toolshed.g2.bx.psu.edu/view/biopython/package_biopython_1_61 <package name="numpy" version="1.7.1"> <repository name="package_numpy_1_7" owner="bgruening" prior_installation_required="True" toolshed="http://toolshed.g2.bx.psu.edu" /> </package> <package name="matplotlib" version="1.2.1"> <repository name="package_matplotlib_1_2" owner="bgruening" prior_installation_required="True" toolshed="http://toolshed.g2.bx.psu.edu" /> </package> My guess is the revisions failed because there is no such repository on the main Tool Shed (they do exist under the new IUC user through, while on the Test Tool Shed they exist under both usernames for now). Bjoern, do you remember if this was a manual upload to the Main Tool Shed, or done via the migration script? Greg, if this was uploaded manually, the reference to non-existent repositories should have shown up as an error. If this was migrated, was there no error message? Bjoern, are you happy to update both the test & main repositories to point at the IUC packages now? Or should I do that myself? Thanks, Peter