diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromPDFA.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromPDFA.java
index c866ae65..eab2e45a 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromPDFA.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromPDFA.java
@@ -137,8 +137,9 @@ public class ZUGFeRDExporterFromPDFA implements IZUGFeRDExporter {
 	 * @throws IOException if anything is wrong with inputstream
 	 */
 	public IZUGFeRDExporter load(InputStream pdfSource) throws IOException {
-		determineAndSetExporter(getPDFAVersion(inputstreamToByteArray(pdfSource)));
-		return theExporter.load(pdfSource);
+		byte[] byteArray=inputstreamToByteArray(pdfSource);
+		determineAndSetExporter(getPDFAVersion(byteArray));
+		return theExporter.load(byteArray);
 	}
 
 	public IZUGFeRDExporter setCreator(String creator) {
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/PDFAWriteTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/PDFAWriteTest.java
index 781c8ddd..579c8296 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/PDFAWriteTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/PDFAWriteTest.java
@@ -26,6 +26,7 @@ import org.junit.runners.MethodSorters;
 import org.mustangproject.*;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.math.BigDecimal;
 import java.util.Date;
@@ -101,7 +102,8 @@ public class PDFAWriteTest extends ResourceCase {
 		File tempFile = getResourceAsFile("MustangGnuaccountingBeispielRE-20201121_508blanko.pdf");
 		int exceptions=0;
 		try {
-			IZUGFeRDExporter zea3 = new  ZUGFeRDExporterFromPDFA().load(tempFile.getAbsolutePath());
+			FileInputStream fis=new FileInputStream(tempFile);
+			IZUGFeRDExporter zea3 = new  ZUGFeRDExporterFromPDFA().load(fis);
 			zea3.setTransaction(i);
 			zea3.setProfile(Profiles.getByName("EN16931"));
 			zea3.export(TARGET_PDF_FROM_A1_UNKNOWN);