the problem of building Reverb

[hedyHe]

hello! I follow you guide to build Reverb ,but when I use the command:mvn clean compile assembly:single ,there are many warnings such as:
[WARNING]
[WARNING] Some problems were encountered while building the effective model for
edu.washington.cs.knowitall:reverb-core:jar:1.4.3-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-sour
ce-plugin is missing. @ edu.washington.cs.knowitall:knowitall-oss:1.0.0, D:\Soft
ware\maven\LocalWarehouse\edu\washington\cs\knowitall\knowitall-oss\1.0.0\knowit
all-oss-1.0.0.pom, line 41, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-java
doc-plugin is missing. @ edu.washington.cs.knowitall:knowitall-oss:1.0.0, D:\Sof
tware\maven\LocalWarehouse\edu\washington\cs\knowitall\knowitall-oss\1.0.0\knowi
tall-oss-1.0.0.pom, line 29, column 15
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten t
he stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support buildin
g such malformed projects.
[WARNING]

And "Build success", but I couldn't use the command :./reverb file1
Could you give me some advice?
Thank you!