diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
index 8dd00be97..88d5f24f9 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
@@ -182,7 +182,7 @@ public class SparkDedupTest implements Serializable {
 			.count();
 
 		assertEquals(3432, orgs_simrel);
-		assertEquals(7152, pubs_simrel);
+		assertEquals(7054, pubs_simrel);
 		assertEquals(344, sw_simrel);
 		assertEquals(458, ds_simrel);
 		assertEquals(6750, orp_simrel);
@@ -234,7 +234,7 @@ public class SparkDedupTest implements Serializable {
 			.count();
 
 		assertEquals(1276, orgs_mergerel);
-		assertEquals(1442, pubs_mergerel);
+		assertEquals(1440, pubs_mergerel);
 		assertEquals(288, sw_mergerel);
 		assertEquals(472, ds_mergerel);
 		assertEquals(718, orp_mergerel);
@@ -423,7 +423,7 @@ public class SparkDedupTest implements Serializable {
 
 		long relations = jsc.textFile(testDedupGraphBasePath + "/relation").count();
 
-		assertEquals(4975, relations);
+		assertEquals(4971, relations);
 
 		// check deletedbyinference
 		final Dataset<Relation> mergeRels = spark
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/ds.curr.conf.json b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/ds.curr.conf.json
index 13b18e1c3..2469b2cc0 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/ds.curr.conf.json
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/ds.curr.conf.json
@@ -6,10 +6,10 @@
     "subEntityType" : "resulttype",
     "subEntityValue" : "dataset",
     "orderField" : "title",
-    "queueMaxSize" : "2000",
+    "queueMaxSize" : "800",
     "groupMaxSize" : "100",
     "maxChildren" : "100",
-    "slidingWindowSize" : "200",
+    "slidingWindowSize" : "80",
     "rootBuilder" : ["result", "resultProject_outcome_isProducedBy", "resultResult_publicationDataset_isRelatedTo", "resultResult_similarity_isAmongTopNSimilarDocuments", "resultResult_similarity_hasAmongTopNSimilarDocuments", "resultOrganization_affiliation_hasAuthorInstitution", "resultResult_part_hasPart", "resultResult_part_isPartOf", "resultResult_supplement_isSupplementTo", "resultResult_supplement_isSupplementedBy", "resultResult_version_isVersionOf" ],
     "includeChildren" : "true",
     "idPath" : "$.id",
@@ -17,8 +17,7 @@
   },
   "pace" : {
     "clustering" : [
-      { "name" : "ngrampairs", "fields" : [ "title" ], "params" : { "max" : "1", "ngramLen" : "3"} },
-      { "name" : "suffixprefix", "fields" : [ "title" ], "params" : { "max" : "1", "len" : "3" } },
+      { "name" : "wordssuffixprefix", "fields" : [ "title" ], "params" : { "max" : "2", "len" : "3" } },
       { "name" : "lowercase", "fields" : [ "doi" ], "params" : { } }
     ],
     "decisionTree" : {
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/orp.curr.conf.json b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/orp.curr.conf.json
index 5fb2a171a..4adcc0439 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/orp.curr.conf.json
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/orp.curr.conf.json
@@ -6,10 +6,10 @@
     "subEntityType" : "resulttype",
     "subEntityValue" : "otherresearchproduct",
     "orderField" : "title",
-    "queueMaxSize" : "2000",
+    "queueMaxSize" : "800",
     "groupMaxSize" : "100",
     "maxChildren" : "100",
-    "slidingWindowSize" : "200",
+    "slidingWindowSize" : "80",
     "rootBuilder" : [ "result", "resultProject_outcome_isProducedBy", "resultResult_publicationDataset_isRelatedTo", "resultResult_similarity_isAmongTopNSimilarDocuments", "resultResult_similarity_hasAmongTopNSimilarDocuments", "resultOrganization_affiliation_hasAuthorInstitution", "resultResult_part_hasPart", "resultResult_part_isPartOf", "resultResult_supplement_isSupplementTo", "resultResult_supplement_isSupplementedBy", "resultResult_version_isVersionOf" ],
     "includeChildren" : "true",
     "idPath" : "$.id",
@@ -17,8 +17,7 @@
   },
   "pace" : {
     "clustering" : [
-      { "name" : "ngrampairs", "fields" : [ "title" ], "params" : { "max" : "1", "ngramLen" : "3"} },
-      { "name" : "suffixprefix", "fields" : [ "title" ], "params" : { "max" : "1", "len" : "3" } },
+      { "name" : "wordssuffixprefix", "fields" : [ "title" ], "params" : { "max" : "2", "len" : "3" } },
       { "name" : "lowercase", "fields" : [ "doi" ], "params" : { } }
     ],
     "decisionTree" : {
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/pub.curr.conf.json b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/pub.curr.conf.json
index d471ccb89..ef0b26af4 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/pub.curr.conf.json
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/pub.curr.conf.json
@@ -6,10 +6,10 @@
     "subEntityType": "resulttype",
     "subEntityValue": "publication",
     "orderField": "title",
-    "queueMaxSize": "2000",
+    "queueMaxSize": "800",
     "groupMaxSize": "100",
     "maxChildren": "100",
-    "slidingWindowSize": "200",
+    "slidingWindowSize": "80",
     "rootBuilder": [
       "result",
       "resultProject_outcome_isProducedBy",
@@ -29,8 +29,7 @@
   },
   "pace": {
     "clustering" : [
-      { "name" : "ngrampairs", "fields" : [ "title" ], "params" : { "max" : "1", "ngramLen" : "3"} },
-      { "name" : "suffixprefix", "fields" : [ "title" ], "params" : { "max" : "1", "len" : "3" } },
+      { "name" : "wordssuffixprefix", "fields" : [ "title" ], "params" : { "max" : "2", "len" : "3" } },
       { "name" : "lowercase", "fields" : [ "doi" ], "params" : { } }
     ],
     "decisionTree": {
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/sw.curr.conf.json b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/sw.curr.conf.json
index f4a107c74..623abbf9f 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/sw.curr.conf.json
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/resources/eu/dnetlib/dhp/dedup/conf/sw.curr.conf.json
@@ -6,10 +6,10 @@
       "subEntityType" : "resulttype",
       "subEntityValue" : "software",
       "orderField" : "title",
-      "queueMaxSize" : "2000",
+      "queueMaxSize" : "800",
       "groupMaxSize" : "100",
       "maxChildren" : "100",
-      "slidingWindowSize" : "200",
+      "slidingWindowSize" : "80",
       "rootBuilder" : [ "result", "resultProject_outcome_isProducedBy", "resultResult_publicationDataset_isRelatedTo", "resultResult_similarity_isAmongTopNSimilarDocuments", "resultResult_similarity_hasAmongTopNSimilarDocuments", "resultOrganization_affiliation_hasAuthorInstitution", "resultResult_part_hasPart", "resultResult_part_isPartOf", "resultResult_supplement_isSupplementTo", "resultResult_supplement_isSupplementedBy", "resultResult_version_isVersionOf" ],
       "includeChildren" : "true",
       "idPath" : "$.id",
@@ -17,8 +17,7 @@
     },
     "pace" : {
       "clustering" : [
-        { "name" : "ngrampairs", "fields" : [ "title" ], "params" : { "max" : "1", "ngramLen" : "3"} },
-        { "name" : "suffixprefix", "fields" : [ "title" ], "params" : { "max" : "1", "len" : "3" } },
+        { "name" : "wordssuffixprefix", "fields" : [ "title" ], "params" : { "max" : "2", "len" : "3" } },
         { "name" : "lowercase", "fields" : [ "doi", "url" ], "params" : { } }
       ],
       "decisionTree": {
diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
index 601cf6449..eb63d4423 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
@@ -156,6 +156,7 @@ public class PrepareRelationsJob {
 			.parquet(outputPath);
 	}
 
+	// experimental
 	private static void prepareRelationsDataset(
 		SparkSession spark, String inputRelationsPath, String outputPath, Set<String> relationFilter, int maxRelations,
 		int relPartitions) {
diff --git a/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml b/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
index 697a00a09..faa81ad64 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
@@ -134,6 +134,7 @@
             <arg>--inputRelationsPath</arg><arg>${inputGraphRootPath}/relation</arg>
             <arg>--outputPath</arg><arg>${workingDir}/relation</arg>
             <arg>--maxRelations</arg><arg>${maxRelations}</arg>
+            <arg>--relationFilter</arg><arg>${relationFilter}</arg>
             <arg>--relPartitions</arg><arg>5000</arg>
         </spark>
         <ok to="fork_join_related_entities"/>
diff --git a/pom.xml b/pom.xml
index 89b7e8829..4619f3174 100644
--- a/pom.xml
+++ b/pom.xml
@@ -315,7 +315,7 @@
 			<dependency>
 				<groupId>eu.dnetlib</groupId>
 				<artifactId>dnet-pace-core</artifactId>
-				<version>4.0.1</version>
+				<version>4.0.2</version>
 			</dependency>
 			<dependency>
 				<groupId>eu.dnetlib</groupId>