diff -r 6b021e8cb8da -r df5045d244d1 src/Tools/isac/Doc/ROOT
--- a/src/Tools/isac/Doc/ROOT	Tue Apr 13 13:20:05 2021 +0200
+++ b/src/Tools/isac/Doc/ROOT	Tue Apr 13 14:07:17 2021 +0200
@@ -1,15 +1,11 @@
-(*~~$ ./bin/isabelle build ???
-*)
+(*~~$ ./bin/isabelle build -v -b Lucas_Interpreter
+ *)
 session "Lucas_Interpreter" in "Lucas_Interpreter" = HOL +
   options [document = pdf, document_output = "output"]
   sessions
     "Interpret"
   theories
     "Lucas_Interpreter"
-  document_files (in "../")
-    "isabelle.sty"
-    "isabellesym.sty"
-    "pdfsetup.sty"
   document_files
     "bend-7-70-en.png"
     "fun-pack-biegelinie-2.png"
@@ -17,19 +13,15 @@
     "root.bib"
     "root.tex"
 
-(*~~$ ./bin/isabelle build -v -b -D ~~/src/Tools/isac/Doc/Specify_Phase
-    *** Bad session root directory: "/usr/local/isabisac/src/Tools/isac/Doc/Specify_Phase"
-  *)
+(*~~$ ./bin/isabelle build -v -b Specify_Phase
+ *)
 session "Specify_Phase" in "Specify_Phase" = HOL +
   options [document = pdf, document_output = "output"]
   sessions
     "Specify"
   theories
     "Specify_Phase"
-  document_files (in "../")
-    "isabelle.sty"
-    "isabellesym.sty"
-    "pdfsetup.sty"
   document_files
     "root.bib"
     "root.tex"
+    "user-requirements.tex"