diff --git a/library/Businessprocess/BpConfig.php b/library/Businessprocess/BpConfig.php
index 04fd331..6fdc733 100644
--- a/library/Businessprocess/BpConfig.php
+++ b/library/Businessprocess/BpConfig.php
@@ -32,6 +32,11 @@ class BpConfig
      */
     protected $backend;
 
+    /**
+     * @var LegacyStorage
+     */
+    protected $storage;
+
     /** @var  Metadata */
     protected $metadata;
 
@@ -455,12 +460,12 @@ class BpConfig
     public function createService($host, $service)
     {
         $node = new ServiceNode(
-            $this,
             (object) array(
                 'hostname' => $host,
                 'service'  => $service
             )
         );
+        $node->setBpConfig($this);
         $this->nodes[$host . ';' . $service] = $node;
         $this->hosts[$host] = true;
         return $node;
@@ -468,7 +473,8 @@ class BpConfig
 
     public function createHost($host)
     {
-        $node = new HostNode($this, (object) array('hostname' => $host));
+        $node = new HostNode((object) array('hostname' => $host));
+        $node->setBpConfig($this);
         $this->nodes[$host . ';Hoststatus'] = $node;
         $this->hosts[$host] = true;
         return $node;
@@ -514,11 +520,12 @@ class BpConfig
      */
     public function createBp($name, $operator = '&')
     {
-        $node = new BpNode($this, (object) array(
+        $node = new BpNode((object) array(
             'name'        => $name,
             'operator'    => $operator,
             'child_names' => array(),
         ));
+        $node->setBpConfig($this);
 
         $this->addNode($name, $node);
         return $node;
@@ -541,18 +548,6 @@ class BpConfig
 
     public function createImportedNode($config, $name = null)
     {
-        if (! isset($this->importedConfigs[$config])) {
-            $import = $this->storage()->loadProcess($config);
-
-            if ($this->usesSoftStates()) {
-                $import->useSoftStates();
-            } else {
-                $import->useHardStates();
-            }
-
-            $this->importedConfigs[$config] = $import;
-        }
-
         $params = (object) array('configName' => $config);
         if ($name !== null) {
             $params->node = $name;
@@ -566,7 +561,15 @@ class BpConfig
     public function getImportedConfig($name)
     {
         if (! isset($this->importedConfigs[$name])) {
-            throw new LogicException("Config $name not imported yet");
+            $import = $this->storage()->loadProcess($name);
+
+            if ($this->usesSoftStates()) {
+                $import->useSoftStates();
+            } else {
+                $import->useHardStates();
+            }
+
+            $this->importedConfigs[$name] = $import;
         }
 
         return $this->importedConfigs[$name];
@@ -577,9 +580,13 @@ class BpConfig
      */
     protected function storage()
     {
-        return new LegacyStorage(
-            Config::module('businessprocess')->getSection('global')
-        );
+        if ($this->storage === null) {
+            $this->storage = new LegacyStorage(
+                Config::module('businessprocess')->getSection('global')
+            );
+        }
+
+        return $this->storage;
     }
 
     /**
@@ -632,11 +639,12 @@ class BpConfig
         $this->calculateAllStates();
 
         $names = array_keys($this->getUnboundNodes());
-        $bp = new BpNode($this, (object) array(
+        $bp = new BpNode((object) array(
             'name' => '__unbound__',
             'operator' => '&',
             'child_names' => $names
         ));
+        $bp->setBpConfig($this);
         $bp->setAlias($this->translate('Unbound nodes'));
         return $bp;
     }
diff --git a/library/Businessprocess/BpNode.php b/library/Businessprocess/BpNode.php
index f514198..c2a8b4a 100644
--- a/library/Businessprocess/BpNode.php
+++ b/library/Businessprocess/BpNode.php
@@ -48,9 +48,8 @@ class BpNode extends Node
 
     protected $className = 'process';
 
-    public function __construct(BpConfig $bp, $object)
+    public function __construct($object)
     {
-        $this->bp = $bp;
         $this->name = $object->name;
         $this->operator = $object->operator;
         $this->childNames = $object->child_names;
@@ -178,7 +177,7 @@ class BpNode extends Node
     {
         if ($this->missing === null) {
             $exists = false;
-            $bp = $this->bp;
+            $bp = $this->getBpConfig();
             $bp->beginLoopDetection($this->name);
             foreach ($this->getChildren() as $child) {
                 if (! $child->isMissing()) {
@@ -299,8 +298,8 @@ class BpNode extends Node
             try {
                 $this->reCalculateState();
             } catch (NestingError $e) {
-                $this->bp->addError(
-                    $this->bp->translate('Nesting error detected: %s'),
+                $this->getBpConfig()->addError(
+                    $this->getBpConfig()->translate('Nesting error detected: %s'),
                     $e->getMessage()
                 );
 
@@ -327,7 +326,7 @@ class BpNode extends Node
      */
     public function reCalculateState()
     {
-        $bp = $this->bp;
+        $bp = $this->getBpConfig();
 
         $sort_states = array();
         $lastStateChange = 0;
@@ -401,7 +400,7 @@ class BpNode extends Node
 
     public function checkForLoops()
     {
-        $bp = $this->bp;
+        $bp = $this->getBpConfig();
         foreach ($this->getChildren() as $child) {
             $bp->beginLoopDetection($this->name);
             if ($child instanceof BpNode) {
@@ -426,7 +425,7 @@ class BpNode extends Node
 
     public function setChildNames($names)
     {
-        if (! $this->bp->getMetadata()->isManuallyOrdered()) {
+        if (! $this->getBpConfig()->getMetadata()->isManuallyOrdered()) {
             natcasesort($names);
             $names = array_values($names);
         }
@@ -451,13 +450,13 @@ class BpNode extends Node
     {
         if ($this->children === null) {
             $this->children = array();
-            if (! $this->bp->getMetadata()->isManuallyOrdered()) {
+            if (! $this->getBpConfig()->getMetadata()->isManuallyOrdered()) {
                 $childNames = $this->getChildNames();
                 natcasesort($childNames);
                 $this->childNames = array_values($childNames);
             }
             foreach ($this->getChildNames() as $name) {
-                $this->children[$name] = $this->bp->getNode($name);
+                $this->children[$name] = $this->getBpConfig()->getNode($name);
                 $this->children[$name]->addParent($this);
             }
         }
diff --git a/library/Businessprocess/HostNode.php b/library/Businessprocess/HostNode.php
index cea73c2..b02d3ec 100644
--- a/library/Businessprocess/HostNode.php
+++ b/library/Businessprocess/HostNode.php
@@ -34,11 +34,10 @@ class HostNode extends MonitoredNode
 
     protected $icon = 'host';
 
-    public function __construct(BpConfig $bp, $object)
+    public function __construct($object)
     {
         $this->name     = $object->hostname . ';Hoststatus';
         $this->hostname = $object->hostname;
-        $this->bp       = $bp;
         if (isset($object->state)) {
             $this->setState($object->state);
         } else {
@@ -62,8 +61,8 @@ class HostNode extends MonitoredNode
             'host' => $this->getHostname(),
         );
 
-        if ($this->bp->hasBackendName()) {
-            $params['backend'] = $this->bp->getBackendName();
+        if ($this->getBpConfig()->hasBackendName()) {
+            $params['backend'] = $this->getBpConfig()->getBackendName();
         }
 
         return Url::fromPath('businessprocess/host/show', $params);
diff --git a/library/Businessprocess/ImportedNode.php b/library/Businessprocess/ImportedNode.php
index 02d0ff2..22c244f 100644
--- a/library/Businessprocess/ImportedNode.php
+++ b/library/Businessprocess/ImportedNode.php
@@ -24,14 +24,13 @@ class ImportedNode extends BpNode
     /** @var string */
     protected $icon = 'download';
 
-    public function __construct(BpConfig $bp, $object)
+    public function __construct(BpConfig $parentBp, $object)
     {
-        $this->parentBp = $bp;
+        $this->parentBp = $parentBp;
         $this->configName = $object->configName;
         $this->nodeName = $object->node;
 
-        $importedConfig = $bp->getImportedConfig($this->configName);
-        parent::__construct($importedConfig, (object) [
+        parent::__construct((object) [
                 'name'          => '@' . $this->configName . ':' . $this->nodeName,
                 'operator'      => null,
                 'child_names'   => null
@@ -55,6 +54,15 @@ class ImportedNode extends BpNode
         return $this->nodeName;
     }
 
+    public function getBpConfig()
+    {
+        if ($this->bp === null) {
+            $this->bp = $this->parentBp->getImportedConfig($this->configName);
+        }
+
+        return $this->bp;
+    }
+
     public function getAlias()
     {
         if ($this->alias === null) {
@@ -89,7 +97,7 @@ class ImportedNode extends BpNode
     {
         if ($this->importedNode === null) {
             try {
-                $this->importedNode = $this->bp->getBpNode($this->nodeName);
+                $this->importedNode = $this->getBpConfig()->getBpNode($this->nodeName);
             } catch (Exception $e) {
                 return $this->createFailedNode($e);
             }
@@ -106,11 +114,12 @@ class ImportedNode extends BpNode
     protected function createFailedNode(Exception $e)
     {
         $this->parentBp->addError($e->getMessage());
-        $node = new BpNode($this->bp, (object) array(
+        $node = new BpNode((object) array(
             'name'        => $this->getName(),
             'operator'    => '&',
             'child_names' => []
         ));
+        $node->setBpConfig($this->getBpConfig());
         $node->setState(2);
         $node->setMissing(false)
             ->setDowntime(false)
diff --git a/library/Businessprocess/Modification/NodeCreateAction.php b/library/Businessprocess/Modification/NodeCreateAction.php
index 2e0fc6b..aa9162e 100644
--- a/library/Businessprocess/Modification/NodeCreateAction.php
+++ b/library/Businessprocess/Modification/NodeCreateAction.php
@@ -101,7 +101,8 @@ class NodeCreateAction extends NodeAction
         } else {
             $properties['child_names'] = array();
         }
-        $node = new BpNode($config, (object) $properties);
+        $node = new BpNode((object) $properties);
+        $node->setBpConfig($config);
 
         foreach ($this->getProperties() as $key => $val) {
             if ($key === 'parentName') {
diff --git a/library/Businessprocess/Node.php b/library/Businessprocess/Node.php
index 5e2d58b..662aca6 100644
--- a/library/Businessprocess/Node.php
+++ b/library/Businessprocess/Node.php
@@ -109,7 +109,18 @@ abstract class Node
         99 => 'PENDING'
     );
 
-    abstract public function __construct(BpConfig $bp, $object);
+    abstract public function __construct($object);
+
+    public function setBpConfig(BpConfig $bp)
+    {
+        $this->bp = $bp;
+        return $this;
+    }
+
+    public function getBpConfig()
+    {
+        return $this->bp;
+    }
 
     public function setMissing($missing = true)
     {
@@ -341,7 +352,7 @@ abstract class Node
      */
     public function getPaths()
     {
-        if ($this->bp->hasRootNode($this->getName())) {
+        if ($this->getBpConfig()->hasRootNode($this->getName())) {
             return array(array($this->getName()));
         }
 
@@ -356,14 +367,6 @@ abstract class Node
         return $paths;
     }
 
-    /**
-     * @return BpConfig
-     */
-    public function getBusinessProcess()
-    {
-        return $this->bp;
-    }
-
     protected function stateToSortState($state)
     {
         if (array_key_exists($state, $this->stateToSortStateMap)) {
diff --git a/library/Businessprocess/Renderer/TileRenderer/NodeTile.php b/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
index 63e4cce..91f9bc6 100644
--- a/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
+++ b/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
@@ -122,7 +122,7 @@ class NodeTile extends BaseHtmlElement
         $renderer = $this->renderer;
 
         $params = [
-            'config'    => $node->getBusinessProcess()->getName(),
+            'config'    => $node->getBpConfig()->getName(),
             'node'      => $node instanceof ImportedNode
                 ? $node->getNodeName()
                 : $this->name
@@ -181,7 +181,7 @@ class NodeTile extends BaseHtmlElement
             $link = Html::tag('a', ['href' => $url, 'data-base-target' => '_next'], $node->getHostname());
         } else {
             $link = Html::tag('a', ['href' => $url], $node->getAlias());
-            if ($node->getBusinessProcess()->getName() !== $this->renderer->getBusinessProcess()->getName()) {
+            if ($node->getBpConfig()->getName() !== $this->renderer->getBusinessProcess()->getName()) {
                 $link->getAttributes()->add('data-base-target', '_next');
             } else {
                 $link->getAttributes()->add('data-base-target', '_self');
diff --git a/library/Businessprocess/Renderer/TreeRenderer.php b/library/Businessprocess/Renderer/TreeRenderer.php
index 04e0ed9..7284ae6 100644
--- a/library/Businessprocess/Renderer/TreeRenderer.php
+++ b/library/Businessprocess/Renderer/TreeRenderer.php
@@ -169,13 +169,13 @@ class TreeRenderer extends Renderer
             $div->add(Html::tag('span', ['class' => 'op'], $node->operatorHtml()));
         }
 
-        if (! $this->isLocked() && $node->getBusinessProcess()->getName() === $this->getBusinessProcess()->getName()) {
+        if (! $this->isLocked() && $node->getBpConfig()->getName() === $this->getBusinessProcess()->getName()) {
             $div->add($this->getActionIcons($bp, $node));
         }
 
         $ul = Html::tag('ul', [
             'class'                         => ['bp', 'sortable'],
-            'data-sortable-disabled'        => $this->isLocked() || $node->getBusinessProcess()->getName() !== $this->getBusinessProcess()->getName() ? 'true' : 'false',
+            'data-sortable-disabled'        => $this->isLocked() || $node->getBpConfig()->getName() !== $this->getBusinessProcess()->getName() ? 'true' : 'false',
             'data-sortable-invert-swap'     => 'true',
             'data-sortable-data-id-attr'    => 'id',
             'data-sortable-draggable'       => '.movable',
@@ -187,7 +187,7 @@ class TreeRenderer extends Renderer
             'data-csrf-token'               => CsrfToken::generate(),
             'data-action-url'               => $this->getUrl()
                 ->overwriteParams([
-                    'config'    => $node->getBusinessProcess()->getName(),
+                    'config'    => $node->getBpConfig()->getName(),
                     'node'      => $node instanceof ImportedNode
                         ? $node->getNodeName()
                         : (string) $node
@@ -222,7 +222,7 @@ class TreeRenderer extends Renderer
         $link->getAttributes()->set('data-base-target', '_next');
         $li->add($link);
 
-        if (! $this->isLocked() && $node->getBusinessProcess()->getName() === $this->getBusinessProcess()->getName()) {
+        if (! $this->isLocked() && $node->getBpConfig()->getName() === $this->getBusinessProcess()->getName()) {
             $li->add($this->getActionIcons($bp, $node));
         }
 
diff --git a/library/Businessprocess/ServiceNode.php b/library/Businessprocess/ServiceNode.php
index 153b010..b40ba02 100644
--- a/library/Businessprocess/ServiceNode.php
+++ b/library/Businessprocess/ServiceNode.php
@@ -14,12 +14,11 @@ class ServiceNode extends MonitoredNode
 
     protected $icon = 'service';
 
-    public function __construct(BpConfig $bp, $object)
+    public function __construct($object)
     {
         $this->name = $object->hostname . ';' . $object->service;
         $this->hostname = $object->hostname;
         $this->service  = $object->service;
-        $this->bp       = $bp;
         if (isset($object->state)) {
             $this->setState($object->state);
         } else {
@@ -49,8 +48,8 @@ class ServiceNode extends MonitoredNode
             'service' => $this->getServiceDescription()
         );
 
-        if ($this->bp->hasBackendName()) {
-            $params['backend'] = $this->bp->getBackendName();
+        if ($this->getBpConfig()->hasBackendName()) {
+            $params['backend'] = $this->getBpConfig()->getBackendName();
         }
 
         return Url::fromPath('businessprocess/service/show', $params);
diff --git a/library/Businessprocess/Storage/LegacyConfigParser.php b/library/Businessprocess/Storage/LegacyConfigParser.php
index 427b3ef..ddcdb29 100644
--- a/library/Businessprocess/Storage/LegacyConfigParser.php
+++ b/library/Businessprocess/Storage/LegacyConfigParser.php
@@ -333,11 +333,12 @@ class LegacyConfigParser
             $childNames[] = $val;
         }
 
-        $node = new BpNode($bp, (object) array(
+        $node = new BpNode((object) array(
             'name'        => $name,
             'operator'    => $op_name,
             'child_names' => $childNames
         ));
+        $node->setBpConfig($bp);
 
         $bp->addNode($name, $node);
     }
diff --git a/test/php/library/Businessprocess/HostNodeTest.php b/test/php/library/Businessprocess/HostNodeTest.php
index 9146bee..ff23476 100644
--- a/test/php/library/Businessprocess/HostNodeTest.php
+++ b/test/php/library/Businessprocess/HostNodeTest.php
@@ -57,9 +57,9 @@ class HostNodeTest extends BaseTestCase
     protected function localhost()
     {
         $bp = new BpConfig();
-        return new HostNode($bp, (object) array(
+        return (new HostNode((object) array(
             'hostname' => 'localhost',
             'state'    => 0,
-        ));
+        )))->setBpConfig($bp);
     }
 }
diff --git a/test/php/library/Businessprocess/ServiceNodeTest.php b/test/php/library/Businessprocess/ServiceNodeTest.php
index c5fd719..d4b3e5a 100644
--- a/test/php/library/Businessprocess/ServiceNodeTest.php
+++ b/test/php/library/Businessprocess/ServiceNodeTest.php
@@ -47,10 +47,10 @@ class ServiceNodeTest extends BaseTestCase
     protected function pingOnLocalhost()
     {
         $bp = new BpConfig();
-        return new ServiceNode($bp, (object) array(
+        return (new ServiceNode((object) array(
             'hostname' => 'localhost',
             'service'  => 'ping <> pong',
             'state'    => 0,
-        ));
+        )))->setBpConfig($bp);
     }
 }