diff --git a/SYS/lhs_log_ext.pbi b/SYS/lhs_log_ext.pbi
index 83e4a6d..57ec22f 100644
--- a/SYS/lhs_log_ext.pbi
+++ b/SYS/lhs_log_ext.pbi
@@ -65,7 +65,7 @@ DeclareModule lhs_log_ext
     #Warning
     #Error
   EndEnumeration
-    
+  Declare IsCreated(UUID.s)
   Declare SetLogFile(UUID.s, LogFileName.s)
   Declare SetMaxSize(UUID.s, Megabyte.i)
   Declare SetLogLevel(UUID.s, Level.i)
@@ -86,7 +86,7 @@ Module lhs_log_ext
   
   Procedure.s Create(Name.s)
     Define.s InternalUUID
-    If Len(Name) > 0 And LockMutex(CreateLoggerMutex)
+    If Len(Name) > 0 And TryLockMutex(CreateLoggerMutex)
       InternalUUID = CreateUUID()
       AddElement(LoggerUUID())
       LoggerUUID() = InternalUUID
@@ -104,9 +104,7 @@ Module lhs_log_ext
       Logger(InternalUUID)\LogDateFormat.s = "%yyyy.%mm.%dd %hh:%ii:%ss"
       UnlockMutex(CreateLoggerMutex)
       ProcedureReturn InternalUUID
-      
     EndIf
-    UnlockMutex(CreateLoggerMutex)
   EndProcedure
   
   Procedure IsCreated(UUID.s)