Index: openacs-4/packages/acs-api-browser/tcl/acs-api-documentation-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-api-browser/tcl/acs-api-documentation-procs.tcl,v
diff -u -r1.77 -r1.78
--- openacs-4/packages/acs-api-browser/tcl/acs-api-documentation-procs.tcl	20 Oct 2024 15:23:13 -0000	1.77
+++ openacs-4/packages/acs-api-browser/tcl/acs-api-documentation-procs.tcl	21 Oct 2024 08:11:40 -0000	1.78
@@ -598,7 +598,7 @@
     if { [llength $doc_elements(positionals)] > 0 } {
         append blocks_out "<dt>Parameters:</dt><dd><dl class='api-doc-parameter-list'>\n"
         foreach positional $doc_elements(positionals) {
-            set pflags $flags($positional)
+            set pflags [expr {[info exists flags($positional)] ? $flags($positional) : {}}]
             if {![info exists default_values($positional)]} {
                 lappend pflags required
             }