netconn-api mvn -X generate-sources error

[ERROR] Failed to execute goal com.rackspace.cloud.api:clouddocs-maven-plugin:1.15.0:generate-webhelp (goal1) on project openstack-network-api-v2: Execution goal1 of goal com.rackspace.cloud.api:clouddocs-maven-plugin:1.15.0:generate-webhelp failed: net.sf.saxon.s9api.SaxonApiException: Processing terminated by xsl:message at line -1 in null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.rackspace.cloud.api:clouddocs-maven-plugin:1.15.0:generate-webhelp (goal1) on project openstack-network-api-v2: Execution goal1 of goal com.rackspace.cloud.api:clouddocs-maven-plugin:1.15.0:generate-webhelp failed: net.sf.saxon.s9api.SaxonApiException: Processing terminated by xsl:message at line -1 in null
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution goal1 of goal com.rackspace.cloud.api:clouddocs-maven-plugin:1.15.0:generate-webhelp failed: net.sf.saxon.s9api.SaxonApiException: Processing terminated by xsl:message at line -1 in null
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
Caused by: com.rackspace.cloud.api.docs.pipeline.PipelineException: net.sf.saxon.s9api.SaxonApiException: Processing terminated by xsl:message at line -1 in null
    at com.rackspace.cloud.api.docs.pipeline.CalabashPipeline.run(CalabashPipeline.java:105)
    at com.rackspace.cloud.api.docs.CalabashHelper.run(CalabashHelper.java:75)
    at com.rackspace.cloud.api.docs.CalabashHelper.createSource(CalabashHelper.java:122)
    at com.rackspace.cloud.api.docs.builders.PDFBuilder.createSource(PDFBuilder.java:1138)
    at com.rackspace.cloud.api.docs.builders.PDFBuilder.processSources(PDFBuilder.java:226)
    at com.rackspace.cloud.api.docs.WebHelpMojo.createSource(WebHelpMojo.java:968)
    at com.agilejava.docbkx.maven.AbstractTransformerMojo.execute(AbstractTransformerMojo.java:154)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    ... 20 more
Caused by: net.sf.saxon.s9api.SaxonApiException: Processing terminated by xsl:message at line -1 in null
    at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:453)
    at com.xmlcalabash.library.XSLT.run(Unknown Source)
    at com.xmlcalabash.runtime.XAtomicStep.run(Unknown Source)
    at com.xmlcalabash.runtime.XCompoundStep.run(Unknown Source)
    at com.xmlcalabash.runtime.XTry.run(Unknown Source)
    at com.xmlcalabash.runtime.XPipeline.doRun(Unknown Source)
    at com.xmlcalabash.runtime.XPipeline.run(Unknown Source)
    at com.xmlcalabash.runtime.XPipelineCall.run(Unknown Source)
    at com.xmlcalabash.runtime.XCompoundStep.run(Unknown Source)
    at com.xmlcalabash.runtime.XPipeline.doRun(Unknown Source)
    at com.xmlcalabash.runtime.XPipeline.run(Unknown Source)
    at com.rackspace.cloud.api.docs.pipeline.CalabashPipeline.run(CalabashPipeline.java:98)
    ... 27 more
Caused by: net.sf.saxon.expr.instruct.TerminationException: Processing terminated by xsl:message at line -1 in null
    at net.sf.saxon.expr.instruct.Message.processLeavingTail(Message.java:274)
    at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:660)
    at net.sf.saxon.expr.instruct.Template.applyLeavingTail(Template.java:239)
    at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:1057)
    at net.sf.saxon.Controller.transformDocument(Controller.java:2080)
    at net.sf.saxon.Controller.transform(Controller.java:1903)
    at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:450)
    ... 38 more
[ERROR]
[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/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :openstack-network-api-v2