Hello, Just to let everyone know, this was an odd situation. That NmrExpPrototype was in Analysis 2.1.5 and 2.2.0 but was removed as redundant in 2.2.1. The Nmr XML file in the project was written in 2.2.1 but for some reason we do not understand still mentioned this NmrExpPrototype (when it should have changed it to refer to the non-redundant version). Normally the backwards compatibility code would automatically have fixed this upon loading up the project but the backwards compatibility code is not run if the version is supposedly up-to-date, as this file was. The solution (which is not guaranteed to have worked but is likely to be ok) is to change the version in the Nmr XML file back to the 2.2.0 version number. Note that the version numbers in the XML files are not the same as the version numbers of Analysis, which is a slight complication. For anyone with a similar error message to the below, in the relevant Nmr XML file (so in the directory PROJECT_DIR/ccp/nmr/Nmr) the second line started with <_StorageUnit release="2.0.5" and that "5" should be changed to a "4". Wayne On Wed, 30 May 2012, Justin Lecher wrote: > Hi (especially the devs), > > What should following error message tell me? > > TopObject with package:gui not found or loaded: > ccp.nmr.NmrExpPrototype:cam_wb104_2008-01-15-16-06-40_000059 > > this comes in a popup when loading the project. > the scary thing is that clicking on okay produces a mem leak flooding > 24GB of RAM in seconds. > > Interestingly, the same project behaves nice on Windows. > > Thanks for suggestions, justin > > -- > Justin Lecher > Institute of Complex Systems > ICS-6 Structural Biochemistry > Research Centre Juelich > 52425 Juelich, Germany > phone: +49 2461 61 2117 > > >