Trivial fix, much improved comprehension of what's going on.
Ok to apply, Lars? And to 1.2.X, JMarc?

Angus
Index: src/graphics/ChangeLog
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/graphics/ChangeLog,v
retrieving revision 1.129
diff -u -p -r1.129 ChangeLog
--- src/graphics/ChangeLog	24 Sep 2002 18:22:50 -0000	1.129
+++ src/graphics/ChangeLog	18 Oct 2002 08:50:26 -0000
@@ -1,3 +1,7 @@
+2002-10-18  Angus Leeming  <[EMAIL PROTECTED]>
+
+	* GraphicsCacheItem.C (findTargetFormat): add debug message.
+
 2002-09-24  Lars Gullik Bjønnes  <[EMAIL PROTECTED]>
 
 	* Makefile.am (INCLUDES): loose SIGC_INCLUDES
Index: src/graphics/GraphicsCacheItem.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/graphics/GraphicsCacheItem.C,v
retrieving revision 1.46
diff -u -p -r1.46 GraphicsCacheItem.C
--- src/graphics/GraphicsCacheItem.C	5 Sep 2002 15:14:20 -0000	1.46
+++ src/graphics/GraphicsCacheItem.C	18 Oct 2002 08:50:26 -0000
@@ -330,6 +330,10 @@ string const findTargetFormat(string con
 	for (; it1 != end; ++it1) {
 		if (from == *it1)
 			return *it1;
+		else
+			lyxerr[Debug::GRAPHICS]
+				<< "Unable to convert from " << from
+				<< " to " << *it2 << std::endl;
 	}
 
 	// So, we have to convert to a loadable format. Can we?
Index: src/graphics/ChangeLog
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/graphics/ChangeLog,v
retrieving revision 1.59.2.12
diff -u -p -r1.59.2.12 ChangeLog
--- src/graphics/ChangeLog	10 Sep 2002 15:54:45 -0000	1.59.2.12
+++ src/graphics/ChangeLog	18 Oct 2002 08:50:49 -0000
@@ -1,3 +1,7 @@
+2002-10-18  Angus Leeming  <[EMAIL PROTECTED]>
+
+	* GraphicsCacheItem.C (findTargetFormat): add debug message.
+
 2002-09-10  Jean-Marc Lasgouttes  <[EMAIL PROTECTED]>
 
 	* GraphicsConverter.C (build_script): do not use ChangeExtension
Index: src/graphics/GraphicsCacheItem.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/graphics/GraphicsCacheItem.C,v
retrieving revision 1.33.2.2
diff -u -p -r1.33.2.2 GraphicsCacheItem.C
--- src/graphics/GraphicsCacheItem.C	17 Jul 2002 21:21:38 -0000	1.33.2.2
+++ src/graphics/GraphicsCacheItem.C	18 Oct 2002 08:50:49 -0000
@@ -434,6 +434,10 @@ string const findTargetFormat(string con
 	for (; it2 != end; ++it2) {
 		if (graphics_converter.isReachable(from, *it2))
 			return *it2;
+		else
+			lyxerr[Debug::GRAPHICS]
+				<< "Unable to convert from " << from
+				<< " to " << *it2 << std::endl;
 	}
 
 	// Failed!

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