This function is available in Rich Client tasks and the Main Program for Rich Client use only.
Before transferring the file to the client, the function performs a request to check if the file on the server is newer than the file on the client cache. If the files have the same timestamp, the function will not copy the file to the client again.
Each call to the function performs a timestamp check, so evaluating the function multiple times for different files may pose a performance issue over a low-bandwidth network. Instead, it is advised to evaluate the function once and use wildcard characters or a folder name. In this case, the timestamp check will be done for all files in one request. Any updated files will be retrieved later on using separate requests.