Index: openacs-4/packages/xowf/tcl/test-item-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowf/tcl/test-item-procs.tcl,v
diff -u -r1.7.2.194 -r1.7.2.195
--- openacs-4/packages/xowf/tcl/test-item-procs.tcl	11 Jan 2022 10:57:32 -0000	1.7.2.194
+++ openacs-4/packages/xowf/tcl/test-item-procs.tcl	12 Jan 2022 11:50:25 -0000	1.7.2.195
@@ -400,7 +400,7 @@
       $shuffleSpec
       $gradingSpec
       $typeSpecificComponentSpec
-      [list [:dict_to_spec -aspair $twocolDict]]
+      [expr {$twocolDict ne "" ? [list [:dict_to_spec -aspair $twocolDict]] : ""}]
       {interaction {$interaction_class,$options,feedback_level=${:feedback_level},auto_correct=${:auto_correct},label=}}
       [:feed_back_definition]
     }]