diff -r 638d02a9a96a -r e6e7a9b9ced7 test/Tools/isac/Test_Isac_Short.thy
--- a/test/Tools/isac/Test_Isac_Short.thy	Tue Jun 01 15:41:23 2021 +0200
+++ b/test/Tools/isac/Test_Isac_Short.thy	Sat Jul 03 16:21:07 2021 +0200
@@ -230,15 +230,6 @@
 subsection \<open>further functionality alongside batch build sequence\<close>
   ML_file "MathEngBasic/thmC.sml"
   ML_file "MathEngBasic/rewrite.sml"
-ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close> ML \<open>
-\<close>
   ML_file "MathEngBasic/tactic.sml"
   ML_file "MathEngBasic/ctree.sml"
   ML_file "MathEngBasic/calculation.sml"
@@ -293,13 +284,14 @@
   ML_file "Knowledge/poly.sml"
   ML_file "Knowledge/gcd_poly_ml.sml"
   ML_file "Knowledge/gcd_poly_winkler.sml" (*must be after gcd_poly_ml.sml: redefines functions*)
-(*ML_file "Knowledge/rational.sml"                                              Test_Isac_Short*)
+  ML_file "Knowledge/rational.sml"                                            (*Test_Isac_Short*)
   ML_file "Knowledge/equation.sml"
   ML_file "Knowledge/root.sml"
   ML_file "Knowledge/lineq.sml"
+
 (*ML_file "Knowledge/rooteq.sml"    some complicated equations not recovered from 2002 *)
 (*ML_file "Knowledge/rateq.sml"     some complicated equations not recovered----Test_Isac_Short*)
-  ML_file "Knowledge/rootrat.sml"
+  ML_file "Knowledge/r/ootrat.sml"
   ML_file "Knowledge/rootrateq.sml"(*ome complicated equations not recovered from 2002 *)
 (*ML_file "Knowledge/partial_fractions.sml"  hangs with ML_system_64 = "true"---Test_Isac_Short*)
   ML_file "Knowledge/polyeq-1.sml"