A Hudson instance has two nodes with RAD installed on each on them:

• The standard master node. RAD is installed (for example) in /apps/dev1/sdp70.
• One slave node where RAD is installed in /apps/dev2/sdp70.

When RAD Builder is invoked on the slave node, it builds the runAnt.bat/runAnt.sh file path based on the RAD installation path of the master node (e.g. the file path is /apps/dev1/sdp70/bin/runAnt.sh). Then, it tries to validate that this file exists on the slave node. But /apps/dev1/sdp70/bin/runAnt.sh doesn't exist on the slave while /apps/dev2/sdp70/bin/runAnt.sh does.
==> The runAnt.bat/runAnt.sh file path must be based on the value defined for the slave node.