diff --git a/mzLib/Readers/timsTOF/TimsTofFileReader.cs b/mzLib/Readers/timsTOF/TimsTofFileReader.cs
index adb1f5f4..8875c89e 100644
--- a/mzLib/Readers/timsTOF/TimsTofFileReader.cs
+++ b/mzLib/Readers/timsTOF/TimsTofFileReader.cs
@@ -49,7 +49,6 @@ public override void InitiateDynamicConnection()
                 throw new FileNotFoundException("Data file is missing .tdf and/or .tdf_bin file");
             }
 
-            _sqlConnection?.Dispose();
             OpenSqlConnection();
 
             if(_fileHandle != null) tims_close((UInt64)_fileHandle);