@Bilel Boubakri, I've tested your use case with getSFTP processor, it worked as expected with given regex (skipped MATFIC dir with all the files in it). I cannot test specifically GetFTP, as we don't have FTP servers running, but I'm sure it should give the same result. Tested with NiFi 1.1.0.2.1.1.0-2. Some suggestions: 1. if you copy-pasted your regex - make sure you don't have new line character 2. make sure your regex is in Path Filter Regex and not in File Filter Regex property 3. If 1 and 2 don't help, try to dance with tambourine and call Cthulhu Hope, that will help! ... View more

@Bilel Boubakri I am assuming you know how many subdirectories there are in this solution. ListFTP - scanning the main directory with all the subdirectories EexcutScript - running a groovy script waiting for all of the flag.ok files to be in the subdirectories FetchFTP - configured to pull the wanted files Here is a snapshot of the simple flow: Here is the sample groovy script for the ExecuteScript processor, configured for this example to wait for 5 files: def flowFiles = session.get(5) if(!flowFiles || flowFiles.size() < 5) { session.rollback() } else { session.transfer(flowFiles, REL_SUCCESS) } waiting-for-5-files-before-ftping-the-files.xml Here is a template of the sample flow ... View more