diff --git a/100_core/src/gplx/Byte_ascii.java b/100_core/src/gplx/Byte_ascii.java
index 721e63fd7..7a7e939f3 100644
--- a/100_core/src/gplx/Byte_ascii.java
+++ b/100_core/src/gplx/Byte_ascii.java
@@ -114,6 +114,7 @@ public class Byte_ascii {
 	, Lt_bry				= new byte[] {Byte_ascii.Lt}
 	, Gt_bry				= new byte[] {Byte_ascii.Gt}
 	, Question_bry			= new byte[] {Byte_ascii.Question}
+	, Backslash_bry         = new byte[] {Byte_ascii.Backslash}
 	, Brack_bgn_bry			= new byte[] {Byte_ascii.Brack_bgn}
 	, Brack_end_bry			= new byte[] {Byte_ascii.Brack_end}
 	, Apos_bry				= new byte[] {Byte_ascii.Apos}
diff --git a/400_xowa/src/gplx/xowa/htmls/core/Xow_hdump_mgr__load.java b/400_xowa/src/gplx/xowa/htmls/core/Xow_hdump_mgr__load.java
index dc7a9e3fc..db5125325 100644
--- a/400_xowa/src/gplx/xowa/htmls/core/Xow_hdump_mgr__load.java
+++ b/400_xowa/src/gplx/xowa/htmls/core/Xow_hdump_mgr__load.java
@@ -100,7 +100,7 @@ public class Xow_hdump_mgr__load implements Gfo_invk {
 		}
 		return src;
 	}
-	private void Fill_page(Xoae_page wpg, Xoh_page hpg) {
+	public void Fill_page(Xoae_page wpg, Xoh_page hpg) {
 		Xopg_html_data html_data = wpg.Html_data();
 		html_data.Display_ttl_(tmp_hpg.Display_ttl());
 		html_data.Content_sub_(tmp_hpg.Content_sub());			
@@ -127,8 +127,9 @@ public class Xow_hdump_mgr__load implements Gfo_invk {
 		int len = src_imgs.Len();
 		for (int i = 0; i < len; ++i) {
 			gplx.xowa.files.Xof_fsdb_itm itm = src_imgs.Get_at(i);
+			if (itm.Orig_ttl() == null) continue; // skip any images without a src; occurs for <score> when lilypond not available; ISSUE#:577 DATE:2019-09-30
 			wpg.Hdump_mgr().Imgs().Add(itm);
-			if (!Io_mgr.Instance.ExistsFil(itm.Html_view_url()))	// if exists, don't add to file_queue; needed for packed; PAGE:en.w:Mexico; DATE:2016-08-14
+			if (!Io_mgr.Instance.ExistsFil(itm.Html_view_url()))// if exists, don't add to file_queue; needed for packed; PAGE:en.w:Mexico; DATE:2016-08-14
 				wpg.File_queue().Add(itm);	// add to file_queue for http_server
 		}
 
diff --git a/400_xowa/src/gplx/xowa/htmls/core/makes/tests/Xoh_make_fxt.java b/400_xowa/src/gplx/xowa/htmls/core/makes/tests/Xoh_make_fxt.java
index a72f878bf..2a1dbe54f 100644
--- a/400_xowa/src/gplx/xowa/htmls/core/makes/tests/Xoh_make_fxt.java
+++ b/400_xowa/src/gplx/xowa/htmls/core/makes/tests/Xoh_make_fxt.java
@@ -22,6 +22,7 @@ public class Xoh_make_fxt {
 	private final    Xowe_wiki wiki;
 	private final    Xoh_make_mgr make_mgr;
 	private final    Gfo_test_list_base expd_redlinks = new Gfo_test_list_base();
+	private Xoh_page actl;
 	public Xoh_make_fxt() {
 		// set member reference
 		this.wiki = parser_fxt.Wiki();
@@ -75,7 +76,7 @@ public class Xoh_make_fxt {
 		html = String_.Replace(html, "'", "\"");
 
 		// init hpg
-		Xoh_page actl = new Xoh_page();
+		actl = new Xoh_page();
 		actl.Ctor_by_hview(parser_fxt.Wiki(), Xoa_url.blank(), parser_fxt.Wiki().Ttl_parse(Xoa_page_.Main_page_bry), 1);
 
 		// run make
@@ -92,4 +93,7 @@ public class Xoh_make_fxt {
 		// check redlinks
 		expd_redlinks.Test(wiki.Html__hdump_mgr().Load_mgr().Make_mgr().Hctx().Page().Html_data().Redlink_list());
 	}
+	public void Exec__Fill_page() {
+		wiki.Html__hdump_mgr().Load_mgr().Fill_page(parser_fxt.Page(), actl);
+	}
 }
diff --git a/400_xowa/src/gplx/xowa/xtns/scores/Score_html_fxt.java b/400_xowa/src/gplx/xowa/xtns/scores/Score_html_fxt.java
new file mode 100644
index 000000000..e2dd7a25a
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/xtns/scores/Score_html_fxt.java
@@ -0,0 +1,64 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.xtns.scores; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
+import gplx.xowa.htmls.core.htmls.*; import gplx.xowa.htmls.core.makes.tests.*;
+class Score_html_fxt {
+	private final    Xoh_make_fxt make_fxt = new Xoh_make_fxt();
+	private final    Xop_fxt parser_fxt = new Xop_fxt();
+	private boolean hdump = false;
+	public void Clear() {
+		parser_fxt.Reset();
+		make_fxt.Clear();
+	}
+	public Score_html_fxt Hdump_n_() {return Hdump_(Bool_.N);}
+	public Score_html_fxt Hdump_y_() {return Hdump_(Bool_.Y);}
+	private Score_html_fxt Hdump_(boolean v) {
+		this.hdump = v;
+		return this;
+	}
+	public void Test__hview(String wtxt, String expd) {
+		parser_fxt.Hctx_(Xoh_wtr_ctx.Basic);
+		parser_fxt.Test_html_full_str(wtxt, expd);
+	}
+	public void Test__hdump(String wtxt, String save, String load) {
+		parser_fxt.Hctx_(Xoh_wtr_ctx.Hdump);
+		parser_fxt.Test_html_full_str(wtxt, save);
+		make_fxt.Test__make(save, make_fxt.Page_chkr().Body_(load));
+	}
+	public void Exec__Fill_page() {
+		make_fxt.Exec__Fill_page();
+	}
+	public String Basic__wtxt() {
+		return "<score>\\relative c' { f d f a d f e d cis a cis e a g f e }</score>";
+	}
+	public String Basic__html(boolean dir_has_value) {
+		String img_id = hdump && dir_has_value ? "xoimg_0" : "xowa_score_0_img";
+		String img_atrs = hdump && dir_has_value ? " alt=\"\"" : " src=\"\"  ";
+		return String_.Concat_lines_nl
+		( ""
+		, "<div id=\"xowa_score_0_pre\" class=\"xowa-score-lilypond\">"
+		, "  <pre style=\"overflow:auto\">\\relative c&#39; { f d f a d f e d cis a cis e a g f e }"
+		, "</pre>"
+		, "</div>"
+		, ""
+		, "<p>"
+		, "  <a id=\"xowa_score_0_a\" href=\"\" xowa_title=\"\">"
+		, "    <img id=\"" + img_id + "\"" + img_atrs + "/>"
+		, "  </a>"
+		, "</p>"
+		);
+	}
+}
diff --git a/400_xowa/src/gplx/xowa/xtns/scores/Score_html_tst.java b/400_xowa/src/gplx/xowa/xtns/scores/Score_html_tst.java
new file mode 100644
index 000000000..5fb9bea59
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/xtns/scores/Score_html_tst.java
@@ -0,0 +1,29 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.xtns.scores; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
+import org.junit.*;
+public class Score_html_tst {
+	private final    Score_html_fxt fxt = new Score_html_fxt();
+	@Before public void init() {
+		fxt.Clear();
+	}
+	@Test   public void Basic() {
+		String wtxt = fxt.Basic__wtxt();
+		fxt.Test__hview(wtxt, fxt.Hdump_n_().Basic__html(Bool_.Y));
+		fxt.Test__hdump(wtxt, fxt.Hdump_y_().Basic__html(Bool_.N), fxt.Basic__html(Bool_.Y));
+		fxt.Exec__Fill_page();
+	}
+}