Service showing unable to load exception

Hi ,

We have a flow service which gets a file from a location in local machine and loads it in a database table.The service is getting the file but not loading the file in table and its showing an exception like this:

" com.wm.lang.flow.FlowException: No CAPS W DXF data loaded. Aborting".

Previously we tested with limited data in that same file and it worked fine but now we have added more data in tat file.
We found no problem in our code and doubt it might be an environment
issue. Help on this issue quickly.