diff --git a/tools-ng/ecdc/scriptlib/build-common.xml b/tools-ng/ecdc/scriptlib/build-common.xml
index dc0e8a1b6..56498ef9b 100644
--- a/tools-ng/ecdc/scriptlib/build-common.xml
+++ b/tools-ng/ecdc/scriptlib/build-common.xml
@@ -4,7 +4,22 @@
 
     <!-- build-common
          defines essential system variables and reads configuration property 
-         files which configure the specialized scripts.                      -->
+         files which configure the specialized scripts.
+
+         System variable list:
+                               
+         ccm.project.dir
+         ccm.tools.xsl.dir
+         ccm.tools.xsd.dir
+         ccm.tools.lib.dir
+         ccm.build.lib.dir
+         ccm.tools.rh-jdo.dir
+         ccm.context.dir
+         ccm.home
+         shared.lib.dist.dir
+         webapp.dist.dir
+         
+                                                                             -->
     <fail message="Property ccm.project.dir not set  "
           unless="ccm.project.dir" />
 
@@ -54,8 +69,13 @@
     <property name="ccm.build.lib.dir" value="${ccm.project.dir}/tools-ng/devel/lib"/>
     <property name="ccm.tools.lib.dir" value="${ccm.project.dir}/tools-ng/common/lib"/>
     <property name="ccm.tools.rh-jdo.dir" value="${ccm.project.dir}/tools-ng/common/classes"/>
+
+    <echo>Project file: ${ccm.bundle.folder}/cfg/project.xml</echo>
     <!-- preliminary, must be taken from project.xml  -->
-    <property name="ccm.home" value="${app.server.webapp.dir}/ROOT"/>
+    <property name="ccm.context.dir" value="/ROOT"/>
+    <echo>Installation context: ${ccm.context.dir}</echo>
+    <property name="ccm.home" value="${app.server.webapp.dir}${ccm.context.dir}"/>
+    <echo>CCM home: ${ccm.home}</echo>
 
     <!-- deprecated  used by prebuild modules only      -->   
     <property name="shared.lib.dist.dir" value="${ccm.tools.lib.dir}"/>