Aloha all, In the process of tracking down misbehavior during export, I ran org-lint, which failed with this error:
Debugger entered--Lisp error: (wrong-number-of-arguments max 0) max() apply(max nil) The backtrace appears to include my entire Org mode file, so I won't attach it. However, here is the part near the bottom, in case it is helpful. org-lint--generate-reports(#<buffer anth_464_syllabus.org> ([cl-struct-org-lint-checker duplicate-custom-id "Report duplicates CUSTOM_ID properties" (link) high] [cl-struct-org-lint-checker duplicate-name "Report duplicate NAME values" (babel link) high] [cl-struct-org-lint-checker duplicate-target "Report duplicate targets" (link) high] [cl-struct-org-lint-checker duplicate-footnote-definition "Report duplicate footnote definitions" (footnote) high] [cl-struct-org-lint-checker orphaned-affiliated-keywords "Report orphaned affiliated keywords" (default) low] [cl-struct-org-lint-checker obsolete-affiliated-keywords "Report obsolete affiliated keywords" (obsolete) high] [cl-struct-org-lint-checker deprecated-header-syntax "Report deprecated Babel header syntax" (babel obsolete) low] [cl-struct-org-lint-checker missing-language-in-src-block "Report missing language in src blocks" (babel) high] [cl-struct-org-lint-checker invalid-babel-call-block "Report invalid Babel call blocks" (babel) high] [cl-struct-org-lint-checker colon-in-name "Report NAME values with a colon" (babel) high] [cl-struct-org-lint-checker wrong-header-argument "Report wrong babel headers" (babel) high] [cl-struct-org-lint-checker wrong-header-value "Report invalid value in babel headers" (babel) low] [cl-struct-org-lint-checker deprecated-category-setup "Report misuse of CATEGORY keyword" (obsolete) high] [cl-struct-org-lint-checker invalid-coderef-link "Report \"coderef\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-custom-id-link "Report \"custom-id\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-fuzzy-link "Report \"fuzzy\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-id-link "Report \"id\" links with unknown destination" (link) high] [cl-struct-org-lint-checker link-to-local-file "Report links to non-existent local files" (link) low] [cl-struct-org-lint-checker non-existent-setupfile-parameter "Report SETUPFILE keywords with non-existent file parameter" (default) low] [cl-struct-org-lint-checker wrong-include-link-parameter "Report INCLUDE keywords with misleading link parameter" (export) low] [cl-struct-org-lint-checker unknown-options-item "Report unknown items in OPTIONS keyword" (export) low] [cl-struct-org-lint-checker invalid-macro-argument-and-template "Report spurious macro arguments or invalid macro templates" (export) low] [cl-struct-org-lint-checker special-property-in-properties-drawer "Report special properties in properties drawers" (properties) high] [cl-struct-org-lint-checker obsolete-properties-drawer "Report obsolete syntax for properties drawers" (obsolete properties) high] [cl-struct-org-lint-checker undefined-footnote-reference "Report missing definition for footnote references" (footnote) high] [cl-struct-org-lint-checker unreferenced-footnote-definition "Report missing reference for footnote definitions" (footnote) high] [cl-struct-org-lint-checker extraneous-element-in-footnote-section "Report non-footnote definitions in footnote section" (footnote) high] [cl-struct-org-lint-checker invalid-keyword-syntax "Report probable invalid keywords" (default) low] [cl-struct-org-lint-checker invalid-block "Report invalid blocks" (default) low] [cl-struct-org-lint-checker misplaced-planning-info "Report misplaced planning info line" (default) low] [cl-struct-org-lint-checker incomplete-drawer "Report probable incomplete drawers" (default) low] [cl-struct-org-lint-checker indented-diary-sexp "Report probable indented diary-sexps" (default) low] [cl-struct-org-lint-checker quote-section "Report obsolete QUOTE section" (obsolete) low])) org-lint--refresh-reports() org-lint--display-reports(#<buffer anth_464_syllabus.org> ([cl-struct-org-lint-checker duplicate-custom-id "Report duplicates CUSTOM_ID properties" (link) high] [cl-struct-org-lint-checker duplicate-name "Report duplicate NAME values" (babel link) high] [cl-struct-org-lint-checker duplicate-target "Report duplicate targets" (link) high] [cl-struct-org-lint-checker duplicate-footnote-definition "Report duplicate footnote definitions" (footnote) high] [cl-struct-org-lint-checker orphaned-affiliated-keywords "Report orphaned affiliated keywords" (default) low] [cl-struct-org-lint-checker obsolete-affiliated-keywords "Report obsolete affiliated keywords" (obsolete) high] [cl-struct-org-lint-checker deprecated-header-syntax "Report deprecated Babel header syntax" (babel obsolete) low] [cl-struct-org-lint-checker missing-language-in-src-block "Report missing language in src blocks" (babel) high] [cl-struct-org-lint-checker invalid-babel-call-block "Report invalid Babel call blocks" (babel) high] [cl-struct-org-lint-checker colon-in-name "Report NAME values with a colon" (babel) high] [cl-struct-org-lint-checker wrong-header-argument "Report wrong babel headers" (babel) high] [cl-struct-org-lint-checker wrong-header-value "Report invalid value in babel headers" (babel) low] [cl-struct-org-lint-checker deprecated-category-setup "Report misuse of CATEGORY keyword" (obsolete) high] [cl-struct-org-lint-checker invalid-coderef-link "Report \"coderef\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-custom-id-link "Report \"custom-id\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-fuzzy-link "Report \"fuzzy\" links with unknown destination" (link) high] [cl-struct-org-lint-checker invalid-id-link "Report \"id\" links with unknown destination" (link) high] [cl-struct-org-lint-checker link-to-local-file "Report links to non-existent local files" (link) low] [cl-struct-org-lint-checker non-existent-setupfile-parameter "Report SETUPFILE keywords with non-existent file parameter" (default) low] [cl-struct-org-lint-checker wrong-include-link-parameter "Report INCLUDE keywords with misleading link parameter" (export) low] [cl-struct-org-lint-checker unknown-options-item "Report unknown items in OPTIONS keyword" (export) low] [cl-struct-org-lint-checker invalid-macro-argument-and-template "Report spurious macro arguments or invalid macro templates" (export) low] [cl-struct-org-lint-checker special-property-in-properties-drawer "Report special properties in properties drawers" (properties) high] [cl-struct-org-lint-checker obsolete-properties-drawer "Report obsolete syntax for properties drawers" (obsolete properties) high] [cl-struct-org-lint-checker undefined-footnote-reference "Report missing definition for footnote references" (footnote) high] [cl-struct-org-lint-checker unreferenced-footnote-definition "Report missing reference for footnote definitions" (footnote) high] [cl-struct-org-lint-checker extraneous-element-in-footnote-section "Report non-footnote definitions in footnote section" (footnote) high] [cl-struct-org-lint-checker invalid-keyword-syntax "Report probable invalid keywords" (default) low] [cl-struct-org-lint-checker invalid-block "Report invalid blocks" (default) low] [cl-struct-org-lint-checker misplaced-planning-info "Report misplaced planning info line" (default) low] [cl-struct-org-lint-checker incomplete-drawer "Report probable incomplete drawers" (default) low] [cl-struct-org-lint-checker indented-diary-sexp "Report probable indented diary-sexps" (default) low] [cl-struct-org-lint-checker quote-section "Report obsolete QUOTE section" (obsolete) low])) org-lint(nil) call-interactively(org-lint record nil) command-execute(org-lint record) helm-M-x(nil "org-lint") call-interactively(helm-M-x nil nil) command-execute(helm-M-x) I suspect I have some error in my Org mode file that is causing abundant confusion. All the best, Tom -- Thomas S. Dye http://www.tsdye.com