diff --git a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2oaf.transformationRule.xml b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2oaf.transformationRule.xml
index 201e5c363..a49687e3a 100644
--- a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2oaf.transformationRule.xml
+++ b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2oaf.transformationRule.xml
@@ -303,7 +303,9 @@ base_dc:link (I used dc:identifier)
 									
 									<oaf:accessrights>
 										<xsl:choose>
+											<xsl:when test="//base_dc:oa[.='0']">CLOSED</xsl:when>
 											<xsl:when test="//base_dc:oa[.='1']">OPEN</xsl:when>
+											<xsl:when test="//base_dc:oa[.='2']">UNKNOWN</xsl:when>
 											<xsl:when test="//base_dc:rightsnorm">
 												<xsl:value-of select="vocabulary:clean(//base_dc:rightsnorm, 'dnet:access_modes')" />
 											</xsl:when>
diff --git a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2odf.transformationRule.xml b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2odf.transformationRule.xml
index 407c51015..0e0e41f12 100644
--- a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2odf.transformationRule.xml
+++ b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/collection/plugin/base/xml/base2odf.transformationRule.xml
@@ -178,6 +178,9 @@
 										</datacite:language>
 
 										<oaf:accessrights>
+											<xsl:if test="//base_dc:oa[.='0']">
+												<datacite:rights rightsURI="http://purl.org/coar/access_right/c_16ec">restricted access</datacite:rights>
+											</xsl:if>
 											<xsl:if test="//base_dc:oa[.='1']">
 												<datacite:rights rightsURI="http://purl.org/coar/access_right/c_abf2">open access</datacite:rights>
 											</xsl:if>
@@ -341,7 +344,9 @@
 									
 									<oaf:accessrights>
 										<xsl:choose>
+											<xsl:when test="//base_dc:oa[.='0']">CLOSED</xsl:when>
 											<xsl:when test="//base_dc:oa[.='1']">OPEN</xsl:when>
+											<xsl:when test="//base_dc:oa[.='2']">UNKNOWN</xsl:when>
 											<xsl:when test="//base_dc:rightsnorm">
 												<xsl:value-of select="vocabulary:clean(//base_dc:rightsnorm, 'dnet:access_modes')" />
 											</xsl:when>
diff --git a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/collection/plugin/base/BaseTransfomationTest.java b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/collection/plugin/base/BaseTransfomationTest.java
index 2bbd87117..6c0c23922 100644
--- a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/collection/plugin/base/BaseTransfomationTest.java
+++ b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/collection/plugin/base/BaseTransfomationTest.java
@@ -1,6 +1,8 @@
 
 package eu.dnetlib.dhp.collection.plugin.base;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 import java.io.IOException;
 
 import org.apache.commons.io.IOUtils;
@@ -63,6 +65,21 @@ public class BaseTransfomationTest extends AbstractVocabularyTest {
 		System.out.println(result.getBody());
 	}
 
+	@Test
+	void testBase2ODF_wrong_date() throws Exception {
+
+		final MetadataRecord mr = new MetadataRecord();
+		mr.setProvenance(new Provenance("DSID", "DSNAME", "PREFIX"));
+		mr.setBody(IOUtils.toString(getClass().getResourceAsStream("record_wrong_1.xml")));
+
+		final XSLTTransformationFunction tr = loadTransformationRule("xml/base2oaf.transformationRule.xml");
+
+		assertThrows(NullPointerException.class, () -> {
+			final MetadataRecord result = tr.call(mr);
+			System.out.println(result.getBody());
+		});
+	}
+
 	private XSLTTransformationFunction loadTransformationRule(final String path) throws Exception {
 		final String xslt = new SAXReader()
 				.read(this.getClass().getResourceAsStream(path))
diff --git a/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/plugin/base/record_wrong_1.xml b/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/plugin/base/record_wrong_1.xml
new file mode 100644
index 000000000..f6dccc006
--- /dev/null
+++ b/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/plugin/base/record_wrong_1.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>                                          
+<record>
+  <header xmlns="http://www.openarchives.org/OAI/2.0/">
+    <identifier>ftunivminnesdc:oai:conservancy.umn.edu:11299/109914</identifier>
+    <datestamp>2023-07-18T20:05:40Z</datestamp>
+  </header>
+  <metadata xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:base_dc="http://oai.base-search.net/base_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <base_dc:dc xsi:schemaLocation="http://oai.base-search.net/base_dc/ http://oai.base-search.net/base_dc/base_dc.xsd">
+      <base_dc:global_id>ftunivminnesdc:oai:conservancy.umn.edu:11299/109914</base_dc:global_id>
+      <base_dc:continent>cna</base_dc:continent>
+      <base_dc:country>us</base_dc:country>
+      <base_dc:collection opendoar_id="1008">ftunivminnesdc</base_dc:collection>
+      <base_dc:collname>University of Minnesota Digital Conservancy</base_dc:collname>
+      <dc:title>An Experimental Investigation of the influence of an air bubble layer on radiated noise and surface pressure fluctuations in a turbulent boundary layer</dc:title>
+      <dc:creator>Killen, John M.</dc:creator>
+      <dc:subject>Boundary layer noise</dc:subject>
+      <dc:subject>Kinetic energy dissipation</dc:subject>
+      <dc:subject>Air bubble layer</dc:subject>
+      <dc:subject>Maximum stable bubble size</dc:subject>
+      <dc:subject>bubble noise spectra</dc:subject>
+      <dc:description>between the noise spectra of a layer of air bubbles in a turbulent flow and' a maximum stable bubble size which can exist in the same flow. An air bubbie layer with individual bubble sizes greater than a maximum stable size was introduced into the boundary layer of water flowing along a smooth flat plate. It was found that the maximum stable bubble size was related to the turbulent kinetic energy dissipation as had been previously shown by other investigators ; Office of Naval Research Arlington, Virginia 22217</dc:description>
+      <dc:date>1981-09-31T21:42:52Z</dc:date>
+      <base_dc:year>1981</base_dc:year>
+      <dc:type>Report</dc:type>
+      <base_dc:typenorm>14</base_dc:typenorm>
+      <dc:identifier>http://purl.umn.edu/109914</dc:identifier>
+      <base_dc:link>http://purl.umn.edu/109914</base_dc:link>
+      <dc:language>en_US</dc:language>
+      <dc:relation>Project Reports</dc:relation>
+      <dc:relation>202</dc:relation>
+      <dc:relation>http://purl.umn.edu/109914</dc:relation>
+      <base_dc:oa>2</base_dc:oa>
+      <base_dc:lang>eng</base_dc:lang>
+    </base_dc:dc>
+  </metadata>
+</record>
\ No newline at end of file