diff --git a/src/python/Publisher/PublisherMasterRucio.py b/src/python/Publisher/PublisherMasterRucio.py
index 581b2a9b42..1e4ed670a3 100644
--- a/src/python/Publisher/PublisherMasterRucio.py
+++ b/src/python/Publisher/PublisherMasterRucio.py
@@ -78,8 +78,10 @@ def __init__(self, confFile=None, quiet=False, debug=True, testMode=False):
     def active_tasks(self, crabServer):
         """
         :param crabServer: CRABRest object to access proper REST as createdin __init__ method
-        :return: a list of dictionaries [{'task':taskname, 'username':username , 'fileDicts':list_of_filedicts}, ...].
-                 First two keys are obvious, 'fileDicts' is a list of dictionaries, one per file with keys:
+        :return: a list of dictionaries, one for each task which has files waiting for publication
+                in filetransfersdb: [{'task':taskname, 'username':username , 'scope':rucioScope,
+                                     'fileDicts':list_of_filedicts}, ...].
+                 First three keys are obvious, 'fileDicts' is a list of dictionaries, one per file with keys:
                    'username', 'cache_url', 'source_lfn', 'publication_state', 'destination',
                    'last_update', 'input_dataset', 'dbs_url', 'aso_worker',
                    'transfer_state', 'destination_lfn', 'dbs_blockname', 'block_complete'
@@ -131,6 +133,10 @@ def active_tasks(self, crabServer):
             for file in filesToPublish:
                 if file['taskname'] == task:
                     taskDict['username'] = file['username']
+                    if file['dbs_blockname']:  # Ruio_ASO puts there a scope:name DID
+                        (rucioScope, blockName) = file['dbs_blockname'].split(':')
+                        taskDict['scope'] = rucioScope
+                        file['dbs_blockname'] = blockName
                     taskDict['destination'] = file['destination']
                     fileList.append(file)
             taskDict['fileDicts'] = fileList
@@ -284,19 +290,12 @@ def startSlave(self, task):  # pylint: disable=too-many-branches, too-many-local
                 if blockName not in numAcquiredFilesPerBlock:
                     numAcquiredFilesPerBlock[blockName] = 0
                 numAcquiredFilesPerBlock[blockName] += 1
-            blocksToPublish.add(blockName)
+                blocksToPublish.add(blockName)
 
         # make sure that we have acquired all files in that block. ref #8491
         for blockName in blocksToPublish.copy():
             countOfAcquiredFilesInBlock = numAcquiredFilesPerBlock[blockName]
-            # start by "finding" rucio scope, later we will pick this from the filetransfers DB
-            rucioScope = f"user.{task['username']}"
-            # beware group scope
-            destLfnParts = task['fileDicts'][0]['destination_lfn'].split('/')
-            if destLfnParts[2] == 'group':
-                groupName = destLfnParts[4]
-                rucioScope = f"group.{groupName}"
-            countOfFilesInRucioDataset = len(list(self.rucio.list_content(scope=rucioScope, name=blockName)))
+            countOfFilesInRucioDataset = len(list(self.rucio.list_content(scope=task['scope'], name=blockName)))
             if countOfAcquiredFilesInBlock != countOfFilesInRucioDataset:
                 # wait until we have acquired all files which Rucio says are in this block
                 blocksToPublish.remove(blockName)