In the past couple of days, upon launching Isabelle jEdit, I get an alert box with the message above and the attached text. Any ideas?

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Larry ~/isabelle/Repos/src/Pure: hg id 362baebe25a5 tip Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Affine_Arithmetic.Affine_Arithmetic" via "Affine_Arithmetic.Ex_Affine_Approximation" via "Affine_Arithmetic.Print") (line 8 of "/Users/lp15/isabelle/afp/devel/thys/Affine_Arithmetic/Print.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "HOL-ODE-Refinement" (line 19 of "/Users/lp15/isabelle/afp/devel/thys/Ordinary_Differential_Equations/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "JinjaThreads.Basic_Main") (line 5 of "/Users/lp15/isabelle/afp/devel/thys/JinjaThreads/Basic/Basic_Main.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "JinjaThreads" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/JinjaThreads/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "DFS_Framework.DFS_Framework" via "DFS_Framework.Param_DFS" via "CAVA_Base.CAVA_Base" via "CAVA_Base.CAVA_Code_Target" via "CAVA_Base.Code_String") (line 9 of "/Users/lp15/isabelle/afp/devel/thys/CAVA_Automata/CAVA_Base/Code_String.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Maxflow_Lib" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Flow_Networks/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (line 14 of "/Users/lp15/isabelle/afp/devel/thys/Iptables_Semantics/ROOT") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Iptables_Semantics" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Iptables_Semantics/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "FOL_Harrison.FOL_Harrison") (line 14 of "/Users/lp15/isabelle/afp/devel/thys/FOL_Harrison/FOL_Harrison.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "FOL_Harrison" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/FOL_Harrison/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "LTL.LTL_Example") (line 9 of "/Users/lp15/isabelle/afp/devel/thys/LTL/example/LTL_Example.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "LTL" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/LTL/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "LLL_Factorization.Modern_Computer_Algebra_Problem") (line 13 of "/Users/lp15/isabelle/afp/devel/thys/LLL_Factorization/Modern_Computer_Algebra_Problem.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "LLL_Factorization" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/LLL_Factorization/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Native_Word.Native_Cast") (line 8 of "/Users/lp15/isabelle/afp/devel/thys/Native_Word/Native_Cast.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Native_Word" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Native_Word/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "CAVA_Base.CAVA_Base" via "CAVA_Base.CAVA_Code_Target" via "CAVA_Base.Code_String") (line 9 of "/Users/lp15/isabelle/afp/devel/thys/CAVA_Automata/CAVA_Base/Code_String.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "CAVA_Base" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/CAVA_Automata/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Transition_Systems_and_Automata.NBA_Explicit" via "Transition_Systems_and_Automata.NBA_Nodes" via "DFS_Framework.Reachable_Nodes" via "DFS_Framework.DFS_Framework" via "DFS_Framework.Param_DFS" via "CAVA_Base.CAVA_Base" via "CAVA_Base.CAVA_Code_Target" via "CAVA_Base.Code_String") (line 9 of "/Users/lp15/isabelle/afp/devel/thys/CAVA_Automata/CAVA_Base/Code_String.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Transition_Systems_and_Automata" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Transition_Systems_and_Automata/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Knuth_Morris_Pratt.KMP") (line 4 of "/Users/lp15/isabelle/afp/devel/thys/Knuth_Morris_Pratt/KMP.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Knuth_Morris_Pratt" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Knuth_Morris_Pratt/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Affine_Arithmetic.Affine_Arithmetic" via "Affine_Arithmetic.Ex_Affine_Approximation" via "Affine_Arithmetic.Print") (line 8 of "/Users/lp15/isabelle/afp/devel/thys/Affine_Arithmetic/Print.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Affine_Arithmetic" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Affine_Arithmetic/ROOT") Cannot load theory "HOL-Library.Code_Char" The error(s) above occurred for theory "HOL-Library.Code_Char" (required by "Isabelle_Meta_Model.Parser_Pure" via "Isabelle_Meta_Model.Meta_Pure" via "Isabelle_Meta_Model.Init") (line 39 of "/Users/lp15/isabelle/afp/devel/thys/Isabelle_Meta_Model/Init.thy") No such file: "HOL-Library.Code_Char" The error(s) above occurred in session "Isabelle_Meta_Model" (line 3 of "/Users/lp15/isabelle/afp/devel/thys/Isabelle_Meta_Model/ROOT") _______________________________________________ isabelle-dev 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