com.documentum.ucf.common.UCFException

Error:
I am getting the error - com.documentum.ucf.common.UCFException, while tried to export the file from DA6.5
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Failed to retrieve content from ACS/BOCS server(s). The ACS/BOCS server(s) may be down or your machine may not be able to reach the server(s) due to network connectivity or configuration issues com.documentum.ucf.common.UCFException: All remote hosts failed
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Resolution:
ACS is a servlet on the Java Method Server and it is down. So check the Tomcat logs. If you don't use this then I would suggest disabling it.
TO disable - modify the setting app.xml in webtop:
As per my DA installtion on local, File path: C:\apache-tomcat-6.0.18\webapps\da\wdk
Please disable it in both - accelerated-read & accelerated-write, by modifing the tag enabled to false.