diff --git a/composer.json b/composer.json
index 3e786433..abceb834 100755
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
   "description" : "XML APIs for the XP Framework",
   "keywords": ["module", "xp"],
   "require" : {
-    "xp-framework/core": "^12.0 | ^11.0 | ^10.0",
+    "xp-framework/core": "^12.11 | ^11.11",
     "xp-framework/collections": "^10.0 | ^9.0 | ^8.0",
     "xp-framework/reflection": "^3.1",
     "php" : ">=7.4.0"
diff --git a/src/main/php/xml/DomXSLProcessor.class.php b/src/main/php/xml/DomXSLProcessor.class.php
index 1fa8a02c..b845908a 100755
--- a/src/main/php/xml/DomXSLProcessor.class.php
+++ b/src/main/php/xml/DomXSLProcessor.class.php
@@ -1,6 +1,6 @@
 <?php namespace xml;
 
-use io\FileNotFoundException;
+use io\NotFound;
 use util\Objects;
 use xml\xslt\{XSLDateCallback, XSLStringCallback};
 
@@ -94,11 +94,11 @@ public function setSchemeHandler($defines) {
    * Set XSL file
    *
    * @param   string file file name
-   * @throws  io.FileNotFoundException
+   * @throws  io.NotFound
    */
   public function setXSLFile($file) {
     if (!file_exists($this->_base.urldecode($file)))
-      throw new FileNotFoundException($this->_base.$file.' not found');
+      throw new NotFound($this->_base.$file.' not found');
 
     libxml_get_last_error() && libxml_clear_errors();
 
@@ -157,7 +157,7 @@ public function setXSLTree(Tree $xsl) {
    */
   public function setXMLFile($file) {
     if (!file_exists($this->_base.urldecode($file))) {
-      throw new FileNotFoundException($this->_base.$file.' not found');
+      throw new NotFound($this->_base.$file.' not found');
     }
     
     libxml_get_last_error() && libxml_clear_errors();
diff --git a/src/test/php/xml/unittest/AbstractProcessorTest.class.php b/src/test/php/xml/unittest/AbstractProcessorTest.class.php
index 06eefddd..63b302c4 100755
--- a/src/test/php/xml/unittest/AbstractProcessorTest.class.php
+++ b/src/test/php/xml/unittest/AbstractProcessorTest.class.php
@@ -1,6 +1,6 @@
 <?php namespace xml\unittest;
 
-use io\FileNotFoundException;
+use io\NotFound;
 use lang\Runtime;
 use test\{Assert, Before, Expect, Test};
 use xml\{TransformerException, Tree};
@@ -71,7 +71,7 @@ public function setUp() {
     $this->xmlDeclaration= '<?xml version="1.0" encoding="'.$this->processorCharset().'"?>';
   }
 
-  #[Test, Expect(FileNotFoundException::class)]
+  #[Test, Expect(NotFound::class)]
   public function setNonExistantXMLFile() {
     $this->processor->setXMLFile(':does-no-exist:');
   }
@@ -106,7 +106,7 @@ public function setMalformedXMLBuf() {
     $this->processor->setXMLBuf('this-is-not-valid<XML>');
   }
 
-  #[Test, Expect(FileNotFoundException::class)]
+  #[Test, Expect(NotFound::class)]
   public function setNonExistantXSLFile() {
     $this->processor->setXSLFile(':does-no-exist:');
   }
diff --git a/src/test/php/xml/unittest/DomXslProcessorTest.class.php b/src/test/php/xml/unittest/DomXslProcessorTest.class.php
index 08c58fa8..14c958ab 100755
--- a/src/test/php/xml/unittest/DomXslProcessorTest.class.php
+++ b/src/test/php/xml/unittest/DomXslProcessorTest.class.php
@@ -1,6 +1,5 @@
 <?php namespace xml\unittest;
 
-use io\FileNotFoundException;
 use lang\{ElementNotFoundException, IllegalArgumentException};
 use test\verify\Runtime;
 use test\{Assert, Expect, Test};