Hello, With regards to the combination of logback-core and slf4j-api. If I want to use v1.0.11 of logback-core, which version of slf4j-api should I use to avoid the getResourceOccurenceCount error ? -logback-core v0.9.30 in combination with slf4j-api v1.6.3 works perfectly -logback-core v1.0.11 in combination with slf4j-api v1.6.3 results in java.lang.NoSuchMethodError: ch.qos.logback.core.util.Loader.getResourceOccurenceCount(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/util/List; -logback-core v1.0.11 in combination with slf4j-api v1.7.5 works perfectly result in java.lang.NoSuchMethodError: ch.qos.logback.core.util.Loader.getResourceOccurenceCount(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/util/List; Regards, Stefan Lecho -- View this message in context: http://logback.10977.n7.nabble.com/Logback-in-combination-with-slf4j-which-v... Sent from the Users mailing list archive at Nabble.com.