checking for the existence of a file

[shree909]

Hi,

i am doing the incremental loading of files , once the files are loaded qvds are generated and  the source files are moved to an destination directory.

As far as this works fine. but when i reload again the script it checks for the files in source directory and throws an error files not found,

Is there a way that we can check the existence of the files before loading the new files..

something like if files exists  load the data or else exit the script or no files found in the source directory..

Thanks