Index: uisimulator/common/io.c
===================================================================
RCS file: /cvsroot/rockbox/uisimulator/common/io.c,v
retrieving revision 1.29
diff -u -r1.29 io.c
--- uisimulator/common/io.c	11 Mar 2006 16:16:15 -0000	1.29
+++ uisimulator/common/io.c	8 Jun 2006 07:56:28 -0000
@@ -311,23 +311,32 @@
         void* ptr2, int bufwrap, void **pd)
 {
     void *hdr;
-    const char *path = "archos/_temp_codec.dll";
+    char path[256];
     int fd;
     int copy_n;
 #ifdef WIN32
     char buf[256];
 #endif
+    int count;
 
     *pd = NULL;
 
     /* We have to create the dynamic link library file from ram
-       so we could simulate the codec loading. */
+       so we could simulate the codec loading.
 
+       Note that the DLL cannot be overwritten whilst in use so 
+       multiple codecs (especially when voice is in use) may require
+       multiple DLLs. */
+    fd = -1;
+    count = 0;
+    while (fd < 0 && count < 999) {
+        sprintf(path, "archos/_temp_codec%d.dll", ++count);
 #ifdef WIN32
-    fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRWXU);
+        fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRWXU);
 #else
-    fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
+        fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
 #endif
+    }
     if (fd < 0) {
         DEBUGF("failed to open for write: %s\n", path);
         return NULL;