Hi Sven, all, I just found out, that one class I use, NeoJSONReader suddenly is missing after loading new. Then I recognized, that in configurationOfZincHTTPComponents>>baseline24: there is a project 'XMLSupport' and 'Neo Json' (with NeoJSONReader) but if I load the configurationOfZincHTTPComponents, ==>> both are not loaded. baseline24: spec .... spec project: 'XML Support' with: [ spec className: 'ConfigurationOfXMLSupport'; versionString: #'stable'; repository: 'http://www.squeaksource.com/MetacelloRepository' ]. spec project: 'Neo JSON' with: [ spec className: 'ConfigurationOfNeoJSON'; versionString: #'stable'; repository: 'http://mc.stfx.eu/Neo' ]. For test, I used load with: Gofer it smalltalkhubUser: 'SvenVanCaekenberghe' project: 'ZincHTTPComponents'; configurationOf: 'ZincHTTPComponents'; loadStable. I am just reading the great new deep into pharo book and the chapter about metacello. It is very helpful to make my own configurationOf in the right way. But in this case, I dont see the reason, why this does not work :-) Can you have a look at it, please? Sabine -- View this message in context: http://forum.world.st/configurationOfZincHTTPComponents-does-not-load-Neo-JS... Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.