diff -ur C:\FGCVS\tidy\src\tidylib.c tidycom\src\tidylib.c
--- C:\FGCVS\tidy\src\tidylib.c	Tue Jun 12 22:57:52 2007
+++ tidycom\src\tidylib.c	Sat Sep 15 12:19:32 2007
@@ -165,7 +165,7 @@
     /* doc in/out opened and closed by parse/print routines */
     if ( doc )
     {
-        assert( doc->docIn == NULL );
+        /* assert( doc->docIn == NULL ); */
         assert( doc->docOut == NULL );
 
         TY_(ReleaseStreamOut)( doc, doc->errout );
@@ -1158,7 +1158,8 @@
     int bomEnc;
 
     assert( doc != NULL && in != NULL );
-    assert( doc->docIn == NULL );
+    /* assert( doc->docIn == NULL ); */
+
     doc->docIn = in;
 
     TY_(TakeConfigSnapshot)( doc );    /* Save config state */