diff --git a/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/converter/BinaryWriter.java b/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/converter/BinaryWriter.java
index 2cbcdc0007..b022e314f1 100644
--- a/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/converter/BinaryWriter.java
+++ b/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/converter/BinaryWriter.java
@@ -34,7 +34,6 @@ public static BinaryDataArrayType createBinaryData(float[] values) {
 		byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
 		byteBuffer.asFloatBuffer().put(floatBuffer);
 		BinaryDataArrayType binaryDataArrayType = createBinaryDataArray(byteBuffer);
-		binaryDataArrayType.setArrayLength(BigInteger.valueOf(values.length));
 		CVParamType cvParamDataType = new CVParamType();
 		cvParamDataType.setAccession("MS:1000521");
 		cvParamDataType.setName("32-bit float");
@@ -49,7 +48,6 @@ public static BinaryDataArrayType createBinaryData(double[] values) {
 		byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
 		byteBuffer.asDoubleBuffer().put(doubleBuffer);
 		BinaryDataArrayType binaryDataArrayType = createBinaryDataArray(byteBuffer);
-		binaryDataArrayType.setArrayLength(BigInteger.valueOf(values.length));
 		CVParamType cvParamDataType = new CVParamType();
 		cvParamDataType.setAccession("MS:1000523");
 		cvParamDataType.setName("64-bit float");
diff --git a/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/v110/model/BinaryDataArrayType.java b/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/v110/model/BinaryDataArrayType.java
index 0d1487ec1a..b3be827559 100644
--- a/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/v110/model/BinaryDataArrayType.java
+++ b/chemclipse/plugins/org.eclipse.chemclipse.msd.converter.supplier.mzml/src/org/eclipse/chemclipse/msd/converter/supplier/mzml/internal/v110/model/BinaryDataArrayType.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015, 2018 Lablicate GmbH.
+ * Copyright (c) 2015, 2021 Lablicate GmbH.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
@@ -12,6 +12,7 @@
 package org.eclipse.chemclipse.msd.converter.supplier.mzml.internal.v110.model;
 
 import java.math.BigInteger;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlAttribute;
@@ -28,7 +29,7 @@ public class BinaryDataArrayType extends ParamGroupType {
 	private byte[] binary;
 	@XmlAttribute(name = "arrayLength")
 	@XmlSchemaType(name = "nonNegativeInteger")
-	private BigInteger arrayLength;
+	private BigInteger arrayLength; // optional, may override defaultArrayLength, not to be used for m/z, intensity and time
 	@XmlAttribute(name = "dataProcessingRef")
 	@XmlIDREF
 	@XmlSchemaType(name = "IDREF")