diff --git a/src/Command/CompoundFind.php b/src/Command/CompoundFind.php
index 69af0e8..8006a80 100644
--- a/src/Command/CompoundFind.php
+++ b/src/Command/CompoundFind.php
@@ -90,7 +90,7 @@ public function execute()
 
         ksort($this->requests);
         $totalRequestCount = count($this->requests);
-        
+
         foreach ($this->requests as $precedence => $request) {
             $findCriterias = $request->findCriteria;
             $critCount = count($findCriterias);
@@ -227,7 +227,7 @@ public function setRangeParams(&$params)
         if ($this->skip) {
             $params['-skip'] = $this->skip;
         }
-        if ($this->max) {
+        if ($this->max !== null) {
             $params['-max'] = $this->max;
         }
     }
diff --git a/src/Command/Find.php b/src/Command/Find.php
index 7059203..31389d9 100644
--- a/src/Command/Find.php
+++ b/src/Command/Find.php
@@ -237,7 +237,7 @@ protected function setRangeParams(&$params)
         if ($this->skip) {
             $params['-skip'] = $this->skip;
         }
-        if ($this->max) {
+        if ($this->max !== null) {
             $params['-max'] = $this->max;
         }
     }
diff --git a/src/Parser/FMResultSet.php b/src/Parser/FMResultSet.php
index 7f6d006..88fd334 100644
--- a/src/Parser/FMResultSet.php
+++ b/src/Parser/FMResultSet.php
@@ -82,6 +82,7 @@ public function parse($xml)
             );
         }
         xml_parser_free($this->xmlParser);
+        unset($this->xmlParser);
         if (!empty($this->errorCode)) {
             return $this->fm->returnOrThrowException(null, $this->errorCode);
         }