Index: openacs-4/packages/categories/tcl/categories-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/tcl/categories-procs.tcl,v
diff -u -r1.38.2.2 -r1.38.2.3
--- openacs-4/packages/categories/tcl/categories-procs.tcl	26 Apr 2019 16:01:40 -0000	1.38.2.2
+++ openacs-4/packages/categories/tcl/categories-procs.tcl	26 Apr 2019 16:06:43 -0000	1.38.2.3
@@ -327,7 +327,10 @@
     Reloads all category translations in the cache.
     @author Timo Hentschel (timo@timohentschel.de)
 } {
-    catch {nsv_unset categories}
+    if {[nsv_names categories] ne ""} {
+        nsv_unset categories
+    }
+
     set category_id_old 0
     set tree_id_old 0
     db_foreach reset_translation_cache {