'dependencies.dependency.version' for io.zipkin:zipkin-ui:jar is missing.

[Robin7Ma]

D:\Workbench\repo\git\github\zpng\spring-cloud-microservice-examples>mvn clean package
[INFO] Scanning for projects...
Downloading: http://repo.spring.io/libs-snapshot-local/org/springframework/boot/spring-boot-starter-parent/1.4.1.RELEASE/spring-boot-starter-parent-1.4.1.RELEASE.pom
Downloading: http://repo.spring.io/libs-snapshot-continuous-local/org/springframework/boot/spring-boot-starter-parent/1.4.1.RELEASE/spring-boot-starter-parent-1.4.1.RELEASE.pom
Downloading: http://repo.spring.io/libs-milestone-local/org/springframework/boot/spring-boot-starter-parent/1.4.1.RELEASE/spring-boot-starter-parent-1.4.1.RELEASE.pom
Downloading: http://repo.spring.io/libs-release-local/org/springframework/boot/spring-boot-starter-parent/1.4.1.RELEASE/spring-boot-starter-parent-1.4.1.RELEASE.pom
Downloaded: http://repo.spring.io/libs-release-local/org/springframework/boot/spring-boot-starter-parent/1.4.1.RELEASE/spring-boot-starter-parent-1.4.1.RELEASE.pom (8 KB at 8.7 KB/sec)
Downloading: http://repo.spring.io/libs-snapshot-local/org/springframework/cloud/spring-cloud-starter-parent/Camden.SR1/spring-cloud-starter-parent-Camden.SR1.pom
Downloading: http://repo.spring.io/libs-snapshot-continuous-local/org/springframework/cloud/spring-cloud-starter-parent/Camden.SR1/spring-cloud-starter-parent-Camden.SR1.pom
Downloading: http://repo.spring.io/libs-milestone-local/org/springframework/cloud/spring-cloud-starter-parent/Camden.SR1/spring-cloud-starter-parent-Camden.SR1.pom
Downloading: http://repo.spring.io/libs-release-local/org/springframework/cloud/spring-cloud-starter-parent/Camden.SR1/spring-cloud-starter-parent-Camden.SR1.pom
Downloaded: http://repo.spring.io/libs-release-local/org/springframework/cloud/spring-cloud-starter-parent/Camden.SR1/spring-cloud-starter-parent-Camden.SR1.pom (5 KB at 5.0 KB/sec)
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] 'dependencies.dependency.version' for io.zipkin:zipkin-ui:jar is missing. @ org.zpng:cloud-zipkin:[unknown-version], D:\Workbench\repo\git\github\zpng\spring-cloud-microservice-examples\cloud-zipkin\pom.xml, line 29, column 17
 @
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR]   The project org.zpng:cloud-zipkin:1.0-SNAPSHOT (D:\Workbench\repo\git\github\zpng\spring-cloud-microservice-examples\cloud-zipkin\pom.xml) has 1 error
[ERROR]     'dependencies.dependency.version' for io.zipkin:zipkin-ui:jar is missing. @ org.zpng:cloud-zipkin:[unknown-version], D:\Workbench\repo\git\github\zpng\spring-cloud-microservice-examples\cloud-zipkin\pom.xml, line 29, column 17
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException

[zpng]

check whether settings.xml is right. And wheter the code is the newest version.